Albert Barnes' Notes on the Whole Bible - 1 John 3:5
And ye know that he was manifested - The Lord Jesus, the Son of God. “You know that he became incarnate, or appeared among people, for the very purpose of putting an end to sin,” Matthew 1:21. Compare the notes at 1 Timothy 3:16. This is the “second” argument in this paragraph, 1 John 3:4-10, by which the apostle would deter us from sin. The argument is a clear one, and is perhaps the strongest that can be made to bear on the mind of a true Christian - that the Lord Jesus saw sin to be so great... read more
The Pulpit Commentary - 1 John 3:5
Two additional reasons for the absolute separation of the children of God from sin. read more