This verse is as clear as good water. We are saved by the grace of God. The shed blood of Jesus Christ at the cross of Calvary cleanse you of every sin (Heb 9:22). The cleansing of the Word of God is like the effect of water that removes the dirt from the body. Get in the Word to live the victorious life that is there for you through the resurrection of Jesus Christ. God chosed Jesus baptism to manifest that he was pleased about Jesus (when Jesus got baptized God said this is my beloved son in whom I am well pleased...) that we have joined His family to live a life separated from the world. We rejoice at the church's baptism services, because the brothers/sisters are making a public confession that they are Jesus followers. Thank you God for your saving grace!