Behold, thou desirest truth in the inward parts: and in the hidden part thou shalt make me to know wisdom. (Psalms 51:6) 1/ The inward parts or hidden part of man. 2/ The truth that God desires there. 3/ The gospel provision of truth and wisdom in the inward parts. *Sermon Summary:* The sermon centers on Psalm 51:6, highlighting God's desire for truth and wisdom in the inward parts of the human heart—a heart that, though deceitful and sinful by nature, is the true seat of one's being. It emphasizes that genuine repentance begins with a heartfelt recognition of sin, not as a mere moral failing but as a deep, abiding reality that only God can reveal and transform. The sermon underscores that God does not demand perfection from fallen humanity but instead provides grace through Christ, who alone can cleanse, renew, and restore the sinner by creating a clean heart and renewing a right spirit. This gospel provision is not based on human effort or self-improvement, but on divine action—God's sovereign work of conviction, pardon, and spiritual renewal, which produces a life marked by genuine faith, love, prayer, and a growing apprehension of Christ's worth. Ultimately, the message calls for a heart religion rooted in humility, dependence on grace, and the joyful assurance that salvation is not of works, but of God's mercy, made known through the wisdom and sacrifice of Jesus Christ.