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

Jesus' ability to cleanse us from sin is evidenced in His actions during His earthly ministry, particularly in the healing of lepers, which was an act reserved for God alone according to Jewish tradition. The phrase 'if you will, you can make me clean' highlights both the faith of the leper and the divine authority of Christ. By curing leprosy—a disease considered incurable by human means—Jesus asserts His identity as the Divine Healer and Savior. This act signifies not only physical healing but a restoration of relationship and fellowship with God, illustrating the transformative power of His atonement for sin.