He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him. He that saith, I know him - This is a severe blow against those false teachers, and against all pretenders to religious knowledge, who live under the power of their sins; and against all Antinomians, and false boasters in the righteousness of Christ as a covering for their personal unholiness. They are all liars, and no truth of God is in them.
Related Commentaries of 1 John 2:4
1 John 2:4
4 He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.