Ye shall not add unto the word which I command you, neither shall ye diminish ought from it, that ye may keep the commandments of the Lord your God which I command you. (Deuteronomy 4:2 KJV) Knowing this first, that no prophecy of the scripture is of any private interpretation. (2 Peter 1:20 KJV)
"BUT IF WE WALK IN THE LIGHT... THE BLOOD OF JESUS HIS SON CLEANSES US FROM ALL SIN. If we say we have no sin, we deceive ourselves, and the truth is not in us. If we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness," 1 John 1:7-9.