IF you believe in Jesus Christ as your PERSONAL saviour and are baptized in His name you will be saved. To MAINTAIN your salvation God has provided that IF you confess your sins He is faithful and just to forgive you of your sins and to cleanse you from ALL unrighteousness. This enables us to continue to walk with Him as we grow in Him and become changed more into His image along the way. This does not give us a license to sin but should we sin, it gives us a way back to His mercy and cleansing. A new beginning point so to speak. Also, when we sin we have an Advocate or Lawyer, Christ Jesus, who stands in our defense based upon His sacrifice upon the cross which paid for our sins, past, present and future.