How do we know God can cleanse us from sin?

The assurance of God's ability to cleanse us from our sin is rooted in His promise through Scripture. Just as the leprous man approached Jesus with faith, asking, 'Lord, if thou wilt, thou canst make me clean' (Luke 5:12), we too can come before God with the same hope. The leper didn’t doubt Jesus’ power; he simply questioned His willingness. And Jesus responded with compassion, declaring, 'I will; be thou clean.' This act foreshadows the greater work of Christ on the cross where He bore our sins in His own body, making all who believe in Him clean. Therefore, through faith, we are assured that our sins can be entirely washed away (1 John 1:7).