Thyatira

Praised for their growing love, faith, service, and patience, but rebuked for tolerating a false prophetess.

A single shaft of light illuminates a worn, weathered sermon elementuscript. shadows dance across the crumpled pages as a disembodied hand reaches from the darkness to underline a passage. a ragged, rusted nail protrudes from the wall, glinting ominously in the glow. the juxtaposition of the holy and the profane, the sacred and the sinister, sets an unsettling tone.

A Review of ‘Sunday Service’ by Paul Francis Lanier

The sermon is a rambling, topical message that uses the life of Elijah as a pretext for promoting Word of Faith theology, extra-biblical revelation, and a flawed, geopolitical view of Israel. The core gospel message is absent, replaced by an emphasis on human performance (fasting, declaring) to unlock God's power. The repeated claims of receiving direct, new information from God ('The Lord said to me,' 'It came to me last night') seriously undermine the authority and sufficiency of the Bible. The extremely low text-to-talk ratio starves the congregation of actual Scripture, replacing it with personal anecdotes and questionable theology.

Read MoreA Review of ‘Sunday Service’ by Paul Francis Lanier
A solitary church stands in a barren field, its once vibrant colors faded and peeling, as a fierce winter storm whips snow across its crumbling facade. through the broken stained glass windows, shafts of pale light illuminate the deserted pews, casting eerie shadows across the dusty floor. in the pulpit, a tattered bible lies open to the gospel of luke, its pages fluttering in the icy draft. outside, the wind howls through the skeletal trees, as if lamenting the church's fall from grace.

A Christmas Service Compromised: When Orthodoxy Meets Error

While the service structure is liturgically sound, incorporating extensive Scripture reading and the Creed, it is fundamentally corrupted by a Word of Faith declaration made during the Lord's Supper. The pastor instructs the congregation to verbally declare that national crises like sickness and recession do not apply to them, a teaching that misrepresents the atonement. Additionally, the practice of Open Communion fails to properly guard the sacrament from profanation and protect participants from taking it in an unworthy manner.

Read MoreA Christmas Service Compromised: When Orthodoxy Meets Error
In the shadows of an old church, a single beam of light illuminates a weathered stone cross, casting long shadows across the wooden pews. the stark image is a metaphor for the disconnect between the the sacred presencemas story and the reality of faith.

One Mediator: Analyzing the Claims of the Christmas Mass

The homily itself is a gentle, topical reflection on the incarnation. However, it is delivered within a liturgical framework that is fundamentally at odds with the biblical gospel. The Eucharistic prayer explicitly claims to transform bread and wine into the physical body and blood of Christ for a 'pure sacrifice,' and prayers rely on the 'constant intercession' of saints. These elements constitute a denial of the sufficiency of Christ's once-for-all sacrifice and His unique role as the sole mediator, classifying the entire service as a proclamation of a different gospel.

Read MoreOne Mediator: Analyzing the Claims of the Christmas Mass
Golden sunlight streams through horizontal wooden blinds, casting a striped pattern across an antique wooden desk. a worn leather-bound bible sits open atop the desk, illuminated by the warm rays.

The Creator’s Word vs. The Creature’s Word: A Review of ‘It’s All About the Word’

The sermon is built on a sound text (John 1) and contains commendable orthodox elements, such as the recitation of the Apostles' Creed and a correct affirmation of Christ's eternality. However, it is fundamentally compromised by a primary error: it conflates the unique, creative power of the Divine Logos (Christ) with the speech of the believer. This slides into Word of Faith doctrine, teaching that believers can 'create' their reality by speaking it, a departure from the biblical model of faith and petition. A secondary error involving a mischaracterization of God's Law further undermines its biblical fidelity.

Read MoreThe Creator’s Word vs. The Creature’s Word: A Review of ‘It’s All About the Word’
A foggy window pane slowly clears, revealing a breathtaking seaside view. waves crash against rugged cliffs as sunlight illuminates the scene. in the foreground, a weathered stone sits in the sand, its edges smoothed by countless tides. a tiny sapling, no more than a few inches tall, grows from a crevice in the rock, its green leaves swaying in the salty breeze.

Is Blessing Earned? A Theological Review of ‘Blessed Because You Believe’

The sermon presents a fundamentally synergistic and anthropocentric message, making human belief the meritorious cause of divine blessing. This framework functionally replaces the gospel of grace with a system of moralistic therapeutic deism. The applications focus on human control and attitude adjustment rather than repentance and faith in the sufficiency of Christ. A claim of direct, extra-biblical revelation ('God whispered to me') further undermines the authority of Scripture.

Read MoreIs Blessing Earned? A Theological Review of ‘Blessed Because You Believe’
A weathered stone pillar, cracked and crumbling, stands alone in a field. gnarled roots wrap around its base, threatening to pull it down. a shaft of golden light pierces the clouds, illuminating the pillar and casting its shadow across the ground. in the distance, a lush green forest stretches to the horizon.

When ‘Being Sent’ Is Built on Sinking Sand: A Theological Review

The sermon presents a fundamentally flawed, man-centered model of the Christian life. It makes God's sovereign act of 'sending' contingent upon the believer's prior performance ('stability'), which is a synergistic error. Furthermore, it redefines the core human problem from sin against God to a therapeutic issue of being 'stuck,' offering a solution of self-improvement rather than redemption. The preacher's claim of direct, verbal revelation for the sermon's content also undermines the sufficiency of Scripture.

Read MoreWhen ‘Being Sent’ Is Built on Sinking Sand: A Theological Review
A tarnished anchor, half-buried in a field of overgrown grass, glints in the fading light of dusk. a single shaft of golden hour sunlight pierces the clouds, illuminating the weathered metal and casting a shadow across the earth.

The Human Jesus: A Review of ‘Sunday Service’ by Paul Francis Lanier

The sermon's central proposition—that believers must know Jesus in His full humanity ('Jesus of Nazareth') and not just His divinity ('Jesus Christ')—is a valid and important starting point. The pastor's zeal is commendable. However, the execution is fatally flawed by three primary errors: 1) A presentation of the incarnation (kenosis) that veers into heresy by suggesting the Son of God 'poured out' or 'fasted' from His divine attributes. 2) Repeated claims of direct, extra-biblical revelation ('Thus saith the Lord'), which undermines the sufficiency of Scripture. 3) A hermeneutic that focuses on geopolitical Israel at the expense of a Christ-centered, redemptive-historical fulfillment. The sermon's extremely low text-to-talk ratio further starves the congregation of God's Word, replacing it with the pastor's personal experiences and theological constructs.

Read MoreThe Human Jesus: A Review of ‘Sunday Service’ by Paul Francis Lanier
A rusted iron chain lies broken and discarded in the sand, half-buried, as if it once held something in place but the object is now gone. a shaft of golden light from the setting sun illuminates one link, while the rest is shrouded in shadow. the ocean waves lap gently at the shore in the background.

Is Your Worship Based on Christ’s Finished Work?

The entire liturgical framework constitutes a fundamental departure from the biblical gospel. It presents a synergistic, works-based soteriology where salvation is mediated through a priestly class and infused via sacraments. The central liturgical act, described as a 'sacrifice,' directly contradicts the biblical teaching of the final, sufficient, once-for-all sacrifice of Jesus Christ on the cross. This is not merely a different emphasis; it is a different gospel.

Read MoreIs Your Worship Based on Christ’s Finished Work?
A single candle in a cavern of stone.

The Good Shepherd: A Review of Will Kranz’s Sermon at The Cove Church

The sermon is an exposition of John 10, contrasting the expected 'Conquering Messiah' with the revealed 'Good Shepherd.' While pastorally warm and well-structured, it contains a critical soteriological error by explicitly defining faith as a human 'choice,' thereby teaching a synergistic (man-centered) gospel instead of a monergistic (God-centered) one.

Read MoreThe Good Shepherd: A Review of Will Kranz’s Sermon at The Cove Church
A lone, weathered wooden cross stands tall atop a grassy hill, its crossbeam broken and dangling. golden hour light bathes the scene, casting long shadows across the textured ground. in the foreground, a small sapling reaches skyward, its trunk bent and misshapen. the contrast of strength and frailty, of brokenness and resilience, embodies the truth that worship is not about our feelings, but about glorifying a the eternal light who transforms us despite our flaws.

Is Worship About Our Feelings or God’s Glory? A Sermon Review

The sermon is constructed on a therapeutic framework, defining worship as emotional catharsis rather than the adoration of God for His objective worth. This leads to a man-centered application of Scripture. The most critical error is a synergistic salvation call that makes human choice the decisive factor, undermining the biblical doctrine of grace. Furthermore, the administration of the Lord's Supper fails to include the necessary biblical warnings, and the speaker's reliance on subjective authority ('God put this word in my heart') weakens the message's foundation.

Read MoreIs Worship About Our Feelings or God’s Glory? A Sermon Review
A crumpled red ribbon, frayed at the edges, lies nestled in a bed of pine needles. a shaft of golden sunlight illuminates the ribbon, casting long shadows across the forest floor. the ribbon is worn and faded, yet still vibrant in the glow of the setting sun. it whispers of a story untold, a truth waiting to be uncovered.

Unwrapping the Truth: A Review of the Sermon ‘Gifts’

The sermon is a topical message on spiritual 'gifts.' However, it is fundamentally flawed by two primary errors: 1) It reverses the biblical formula for strength by teaching that our joy given to God is a prerequisite for receiving His strength, a synergistic error. 2) It promotes an over-realized eschatology by presenting guaranteed physical healing as a present entitlement of the atonement. These errors undermine the doctrines of Sola Gratia and the sufficiency of Christ's work.

Read MoreUnwrapping the Truth: A Review of the Sermon ‘Gifts’
A flickering candle illuminates a golden chalice atop a stone altar, casting eerie shadows that dance and twist in the candlelight.

Divine Prompts or Dangerous Deception? Unpacking the ‘Do Whatever He Tells You’ Doctrine

This sermon is fundamentally in error, built upon a foundation of claimed extra-biblical revelation and a synergistic view of faith. The core message replaces the objective authority of Scripture with subjective, internal 'prompts,' a classic error of Neo-Montanism. Furthermore, it frames God's provision as contingent upon human obedience, particularly financial giving, which functionally operates as Prosperity Theology. The central proposition, 'when you do what you can do, God will do what you cannot do,' is a clear articulation of Semi-Pelagianism, undermining the doctrine of salvation and sanctification by grace alone.

Read MoreDivine Prompts or Dangerous Deception? Unpacking the ‘Do Whatever He Tells You’ Doctrine
A safe filled with gold, illuminated by light and shadow.

More Than Money: A Theological Review of Michael Todd’s ‘Crazy Faith’ Sermon

The sermon, while using the story of Mary's sacrificial worship as a textual anchor, is fundamentally a Word of Faith message promoting the Prosperity Gospel. It frames a special offering ('Crazy Faith Offering') as a mechanism for triggering divine financial intervention. The core theological error is the redefinition of faith from trust in God's sovereign will to a force that obligates God to act, particularly in the realm of finances. This transactional model corrupts the doctrines of grace, faith, and God's sovereignty, constituting a fundamental error. The use of subjective authority ('God told me') further undermines the sufficiency of Scripture.

Read MoreMore Than Money: A Theological Review of Michael Todd’s ‘Crazy Faith’ Sermon
A rusty vending machine sits locked and empty, its coin slot sealed. shafts of fading light filter through the grime on the scratched glass, illuminating a faded, unreadable label. the machine appears abandoned and obsolete, a relic of a bygone era when vending machines worked.

Is God a Partner or a Vending Machine? A Review of ‘Worship Service’

The sermon presents a moralistic and transactional framework for stewardship, using the Magi's gifts as a pretext to teach the 'Time, Talent, Treasure' model. The core theological error is a Prosperity Gospel-lite application of Malachi 3:10, promising predictable, universal blessings for tithing. This is compounded by a hermeneutical error in reversing Matthew 6:21 to claim 'giving produces loving.' The sacrament of communion was also administered without any biblical fencing, constituting a serious pastoral failure.

Read MoreIs God a Partner or a Vending Machine? A Review of ‘Worship Service’
In the darkness, a single candle burns with tenuous light, its glow dancing on the cold stone. the shadows it casts are long, stretching across the barren ground, reaching for an impossible peace. the flame is small, but its light pushes back the darkness. slowly, the light grows, the shadows recede, until finally, a stillness settles over the land. the candle's glow illuminates the scene, revealing a once-hidden world, now bathed in a soft, peaceful radiance.

The Gospel Inverted: Can We ‘Work’ Our Way to Peace?

This sermon presents a fundamentally flawed soteriology. By positing that peace is the result of human works of justice ('If we want to know peace... we have to be willing to... work for justice'), it inverts the gospel order. It functionally teaches a synergistic or works-based model for achieving spiritual wholeness, which obscures the finished work of Christ and places the burden of reconciliation on the sinner. This is a form of legalism that cannot produce true, lasting peace with God.

Read MoreThe Gospel Inverted: Can We ‘Work’ Our Way to Peace?
A weathered anchor, encrusted with barnacles, rests on a rocky shore at sunset. golden light illuminates the scene.

Is Baptism Necessary for Forgiveness? A Review of ‘The Final Countdown’

The sermon presents a significant soteriological error by explicitly teaching that the remission of sins is instrumentally caused by the act of baptism. This position, stated at the outset, fundamentally alters the gospel of grace by adding a sacramental work as a condition for forgiveness. While the sermon's intent is to motivate the congregation toward future growth and seriousness, its foundation is built on a misunderstanding of justification by faith alone. The use of Scripture is largely pretextual, serving as a framework for a vision-casting and administrative address rather than a direct exposition of the text.

Read MoreIs Baptism Necessary for Forgiveness? A Review of ‘The Final Countdown’
A weathered signpost, half-buried in sand and overgrown with wildflowers, points down a winding, rocky path that disappears into a distant canyon. the camera pans slowly from the signpost, following the trail into the shadowed depths of the ravine.

Plan C or a Corrupted Gospel? A Theological Review

This sermon is fundamentally in error. While presented with biblical stories, its core theological engine is synergistic, teaching that human action ('releasing') is the prerequisite for receiving God's blessing. This anthropocentric hermeneutic (Narcigesis) frames the entire biblical narrative around the listener's personal journey, reducing God to a facilitator of their success. Furthermore, the speaker claims direct prophetic authority, undermining the sufficiency of Scripture. The result is a therapeutic, man-centered message that corrupts the doctrine of salvation by grace alone.

Read MorePlan C or a Corrupted Gospel? A Theological Review
A weathered anchor, rusted by time and tide, clings to a rocky shore. waves lap at its edges as shafts of golden light illuminate the pitted surface. in the distance, a lighthouse beam sweeps the horizon, a beacon of hope in the gathering dark.

The Foundation of Hope: Is It God’s Promise to Us, or Our Promise to Him?

The sermon's exposition of Isaiah 2 is biblically sound and effectively illustrated. The service as a whole, however, is fundamentally undermined by a synergistic soteriology embedded within its baptismal liturgy. The vow-based structure presents salvation and covenant membership as a bilateral contract dependent on human commitment, thereby corrupting the doctrine of salvation by grace alone through faith alone.

Read MoreThe Foundation of Hope: Is It God’s Promise to Us, or Our Promise to Him?
Abandoned altar, bathed in gold.

The Haggai Hustle: When Building God’s House Becomes a Transaction

The sermon's central proposition is a transactional formula: prioritizing the church's financial needs guarantees personal material blessing from God. This constitutes a form of the Prosperity Gospel, rooted in a legalistic application of Old Covenant tithing laws (Malachi 3) and a pretextual use of Haggai 1. The message functionally denies grace by making blessing contingent on financial works. This is compounded by a claim of direct, conversational revelation ('The Lord said...') which undermines Scriptural sufficiency.

Read MoreThe Haggai Hustle: When Building God’s House Becomes a Transaction
A withered flower rests on a wooden table, illuminated by a single shaft of golden light from a nearby window. the petals are crumpled, and the stem is dry and brittle. a small stone rests by its side.

The Dangers of a Therapeutic Gospel: When ‘Gratitude’ Replaces Repentance

The sermon is fundamentally in error due to a critical corruption of hamartiology (the doctrine of sin). By redefining sin as a 'mistaken identity' rather than a vertical rebellion against God's holy law, the sermon transforms the Gospel from a message of judicial redemption into a program of therapeutic self-help. This error, combined with a transactional view of God's favor, results in a message that is ultimately anthropocentric and fails to preach the biblical Christ.

Read MoreThe Dangers of a Therapeutic Gospel: When ‘Gratitude’ Replaces Repentance
A flickering candle, its flame dancing atop a mound of crumpled dollar bills. the smoke rises, curling and twisting as it climbs towards the ceiling, only to vanish into the shadows. in the foreground, a stone altar. behind it, a dark shadow. an ancient ritual. an offering to appease an angry the eternal light.

Tithing, Terror, and ‘Strange Fire’: A Review of ‘The Truth about Israel’

The sermon fundamentally errs by conflating the unique Old Testament command of 'herem' (things devoted to destruction) with the principle of the tithe. This hermeneutical failure creates a legalistic foundation, motivating giving through fear of punishment rather than as a joyful response to grace. The resulting message is a transactional system of curse-avoidance that functionally undermines the sufficiency of Christ's work and places believers back under the Law.

Read MoreTithing, Terror, and ‘Strange Fire’: A Review of ‘The Truth about Israel’
A shaft of golden sunlight illuminates a weathered wooden cross, its grain highlighted by the warm glow. the cross rests atop a stack of rough-hewn stones, each one textured and unique. in the background, a distant lake reflects the golden hour light, the sun's rays dancing across the water's surface.

Positional Truth or Transactional Promise? A Review of ‘The Three Realms’

The sermon correctly identifies the believer's seated position with Christ in the heavenly realms as a source of authority. The core exposition of Ephesians 2 is sound. However, this biblical foundation is critically undermined by three errors: 1) A transactional prosperity mechanism is introduced, promising a '50-year generational blessing' for a 'miracle offering.' 2) The pastor makes extensive use of subjective authority, issuing personal, declarative 'blessings' that model a form of spirituality untethered from Scripture. 3) The call for salvation relies on a synergistic, decision-centric framework that obscures God's sovereign work in regeneration.

Read MorePositional Truth or Transactional Promise? A Review of ‘The Three Realms’
A beam of golden light illuminates a stack of antique books, shining through a stained glass window. in the shadows, a gilded money clip rests atop a leatherbound bible. the light fades, leaving only the faint gleam of gold.

Is Your Faith an Investment? A Theological Review of ‘Eternal ROI’

The sermon is fundamentally flawed, promoting a Prosperity Gospel hermeneutic by misapplying Old Covenant promises (Malachi 3) to guarantee material protection for New Covenant believers. It redefines sin as poor investment ('waste') and frames the Christian life as a pursuit of 'Eternal ROI,' which is a form of anthropocentric therapeutic deism. A claim to direct, private revelation ('the Holy Spirit whispers to me') further undermines biblical authority.

Read MoreIs Your Faith an Investment? A Theological Review of ‘Eternal ROI’
A tarnished, rust-colored stone, smoothed by millennia of water and weather, sits at the center of a shallow pool. dappled sunlight from the golden hour filters through the water, illuminating the intricate patterns etched into the rock's surface. the stone's rough, pitted exterior belies a core of shimmering, precious metal glinting within.

Is Tithing a Transaction? A Biblical Look at Malachi 3

The sermon fundamentally errs by teaching a form of the Prosperity Gospel. It misuses Malachi 3 to impose an Old Covenant law upon New Covenant believers, framing the tithe as a transactional mechanism to compel God's material blessing and protection. This legalistic approach undermines the doctrine of salvation by grace and presents God as a reactive deity whose favor is contingent upon human financial performance.

Read MoreIs Tithing a Transaction? A Biblical Look at Malachi 3
A rusty, tarnished doorknob sits in the center of a weathered wooden door. golden light streams through cracks around the frame, illuminating a layer of dust and grime on the knob's surface. the door appears ancient and abandoned, with peeling paint and deep scratches marring the once-smooth wood.

Is Thankfulness the Key to Heaven? A Warning Against Works-Based Worship

The sermon is built on a fundamentally flawed proposition: that human-generated thankfulness and praise are the means by which a person enters God's presence. This functionally replaces the finished work of Christ and His shed blood as the sole basis for access, constituting a works-based system of righteousness. The message is therefore classified as Path A, as it corrupts the core of the gospel message (Sola Christus).

Read MoreIs Thankfulness the Key to Heaven? A Warning Against Works-Based Worship
A spiral staircase, its worn wooden steps illuminated by shafts of golden sunlight piercing through ornate stained glass windows. the camera pans slowly upward, revealing the staircase to extend infinitely into the heavens, vanishing into the light above.

The Seduction of Self-Help: A Theological Review of ‘The Power of Spiritual Thinking’

This sermon is a clear articulation of the Prosperity Gospel, rooted in Word of Faith and New Thought metaphysics. The core message is that believers can master their own lives and manifest their desired reality by mastering their minds. God is functionally reduced to a power source activated by human faith and confession, while sin is redefined as negative thinking and Christ's work is presented as a means to personal empowerment rather than atonement for sin. The use of subjective authority claims ('my spirit told me') further undermines the sufficiency of Scripture. This is a fundamental departure from biblical orthodoxy.

Read MoreThe Seduction of Self-Help: A Theological Review of ‘The Power of Spiritual Thinking’
A rose, once vibrant and fragrant, now withers on its stem. its petals droop, turning from lush green to sickly brown. yet, despite its decay, the stem holds fast to the branch, unwilling to let go. the rose's stubborn endurance, powered by its own fading strength, prolongs its suffering, preventing it from finding peace in its fall.

The Peril of Endurance: When ‘Holding On’ Replaces God’s Grace

The sermon presents a synergistic view of salvation, specifically regarding perseverance. By interpreting Matthew 24:13 ('he who endures to the end will be saved') as a condition to be fulfilled by human choice, it functionally denies the doctrine of the Perseverance of the Saints. While correctly defining God's sovereignty, it fails to apply that sovereignty to the preservation of the believer, resulting in a message of works-based assurance. The core error is a confusion of the evidence of salvation (endurance) with the cause of salvation (grace).

Read MoreThe Peril of Endurance: When ‘Holding On’ Replaces God’s Grace
A lone oak tree stands tall in a vast, barren field. its gnarled branches reach skyward, weathered by countless storms. a single shaft of golden sunlight pierces the overcast sky, illuminating the tree's trunk. the light bathes the tree in an ethereal glow, hinting at divine favor.

Walking with God: Is Our Obedience the Cause of Grace or the Effect?

The sermon is an exposition of Genesis 6-7 that functionally teaches a synergistic soteriology, where human willingness to 'walk with God' is the decisive condition for receiving grace and averting judgment. This core error is compounded by a claim to extra-biblical revelation ('I could see...') used to direct the congregation, thereby undermining the sufficiency of Scripture. While commendable for its high view of God's authority, the sermon's mechanism for relating to that authority is fundamentally flawed, replacing the Gospel of grace with a gospel of human cooperation and performance.

Read MoreWalking with God: Is Our Obedience the Cause of Grace or the Effect?
A dark, shadowy forest illuminated by a single shaft of golden light illuminating a thick, rustic wooden door with a tarnished iron handle. the door is slightly ajar, with a faint glow eelementating from the other side.

The Error of the Second Blessing: A Theological Review of ‘Essential Foundations’

The sermon's central thesis is the promotion of the Pentecostal/Charismatic doctrine of a 'Second Blessing,' a post-salvation baptism in the Holy Spirit evidenced by speaking in tongues. This constitutes a critical error, as it undermines the biblical teaching that every believer is definitively baptized by the Spirit into Christ at the moment of regeneration (1 Cor 12:13). The hermeneutic employed misuses the descriptive, transitional history of the book of Acts as a universal prescription for the Church. This creates a two-tiered system of Christianity ('have' and 'have-nots') and functionally denies the sufficiency of the Spirit's work in salvation. Furthermore, the observance of Open Communion represents a serious failure in pastoral duty to guard the Lord's Table.

Read MoreThe Error of the Second Blessing: A Theological Review of ‘Essential Foundations’
At a dusty crossroads, a shaft of golden light illuminates a weathered wooden signpost. arrows point in three directions: doom, distinction, drawing. in the distance, shadows of huelement structures are visible on each path.

The Decisive Cross: A Review of John 12 at Trinity Baptist

The sermon is an expository treatment of John 12:31-36, structured around three effects of the cross. The homiletical structure is clear and the delivery is earnest. However, a significant theological error emerges in the explanation of Christ's statement that He will 'draw all people.' The pastor articulates a universal, resistible drawing, which functionally teaches a synergistic model of salvation (Semi-Pelagianism). This error undermines the biblical doctrine of God's sovereign, effectual grace and misrepresents the nature of the atonement, requiring a classification of 'Fundamentally in Error'.

Read MoreThe Decisive Cross: A Review of John 12 at Trinity Baptist