How do we know that Jesus can cleanse us from sin?

In the biblical narrative, particularly in Mark 1:40-42, the leper approaches Jesus with a plea for cleansing. He acknowledges Jesus' authority by stating, 'If you will, you can make me clean.' Jesus responds with, 'I will; be thou clean,' demonstrating His willingness and power to cleanse. This incident reveals that Jesus is not only capable of healing physical ailments but also has the authority to forgive and cleanse from sin. His miracles serve as a testimony of His divine nature and the reality that He can address our deepest needs, making it clear that faith in Him results in true cleansing and redemption.