How do we know God's will is essential for cleansing from sin?

The leper's request to Jesus, 'If thou wilt, thou canst make me clean,' epitomizes the understanding that cleansing from sin is contingent upon God's will rather than human action. The leper recognized his own inability to be cleansed and approached Jesus with humility and faith. This exemplifies the Reformed view that God's sovereign will must be the driving force behind salvation, as supported by John 8:24, which reveals the necessity of believing in Christ to avoid dying in our sins. Thus, we see the interplay between human acknowledgment of unworthiness and God's gracious disposition to save.