If we say we have no sin we deceive ourselves and the truth is not in us, but, if we confess our sins, God is faithful and just to forgive us our sins and to cleanse us from all unrighteousness. 1 John 1:8-9

Have mercy upon me, O God, according to thy lovingkindness: according unto the multitude of thy tender mercies blot out my transgressions. Wash me thoroughly from my iniquity and cleanse me from my sin, for I acknowledge my transgressions and my sin is ever before me. Against You, You only, I have sinned and done what is evil in Your sight, so that You are justified when You speak and blameless when You judge. Create in me a clean heart O God and renew a right spirit within me. Psalm 51