What does spiritual maturity look like?

The sermon centers on the necessity of spiritual maturity within the church, using 1 Corinthians 3:1–9 as a foundation to critique infantile spiritual development marked by division, pride, and superficial understanding. Drawing on the Dunning-Kruger effect, it illustrates how early spiritual growth can lead to overconfidence and conflict when believers remain in the 'mountain of stupidity' without progressing through the 'valley of despair' into deeper wisdom. Paul's metaphor of milk versus solid food underscores the call to move beyond infantile dependence on leaders and toward personal, Spirit-led engagement with Scripture. The church is portrayed not as a building or institution, but as a living organism whose health is measured by its ability to reproduce disciples—each member called to nurture others in their journey from spiritual infancy to mature leadership. Ultimately, the message is one of hopeful urgency: while God alone brings growth, every believer is invited to participate in the divine work of discipleship, ensuring the church remains a flowing stream of grace, not a stagnant pool of self-satisfaction.