Wash me throughly from mine iniquity, And cleanse me from my sin. Psalms 51:2 

Only God can wash away sin! Only God can really removed our sins from our lives. In the Old Testament people would sacrifice caves and lambs as an offering for their sin but the Bible tells us that it was only a picture of Christ. It was only a picture of what Jesus did for us. Only the blood of Christ can wash away sins. We should know that Jesus is the only way to be saved.