1 John 2:3-6

3 And by this we do know that we know him, if we keep his commandments.

4 He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.

5 But whoever keepeth his word, in him verily is the love of God perfected: by this we know that we are in him.

6 He that saith he abideth in him, ought himself also so to walk, even as he walked.