This sermon, rooted in Hebrews 6, presents a sobering yet pastoral reflection on the distinction between genuine believers and those who are self-deceived, emphasizing that true faith is marked by enduring fruit and progressive sanctification. It argues that the passage does not teach that believers can lose their salvation, but rather warns of a category of individuals who once experienced spiritual blessings—enlightenment, fellowship with the Holy Spirit, and the power of God's Word—yet ultimately abandoned them through persistent rebellion, rendering them unable to repent due to their hardened hearts. The central theological theme is the doctrine of human inability: apart from divine grace, no one can come to Christ, as repentance is a gift from God, not a human achievement. The sermon underscores the necessity of church discipline as a loving, gospel-centered call to repentance, not a punitive act, and calls the church to rely solely on the power of God's Word and Spirit, recognizing that only divine intervention can open blind eyes and renew hearts.