Pelagianism: The belief that human beings can achieve salvation and holiness through their own free will and efforts, without the necessity of divine grace.

While the sermon offers practical illustrations for Christian living, it fundamentally misdiagnoses the source of spiritual growth. By defining maturity as 'spiritual adulting'—a verb of behavioral modification—the message inadvertently promotes a works-based system of sanctification. This undermines the sufficiency of Christ's work in the believer's daily life, replacing reliance on the Holy Spirit with reliance on human willpower.

Biblical Parallel (Archetype): Laodicea — The sermon exhibits the characteristics of therapeutic deism and moralistic self-improvement. By framing spiritual maturity as a matter of behavioral 'adulting' and self-driven practice, the message reduces the Christian life to a self-help program. This approach bypasses the necessity of the Gospel for sanctification, presenting holiness as a result of human willpower rather than the fruit of the Spirit, which aligns with the lukewarm, self-sufficient state of Laodicea.