1 John 2:3-6

3 Now by this we may be sure that we know him, if we obey his commandments.

4 Whoever says, "I have come to know him," but does not obey his commandments, is a liar, and in such a person the truth does not exist;

5 but whoever obeys his word, truly in this person the love of God has reached perfection. By this we may be sure that we are in him:

6 whoever says, "I abide in him," ought to walk just as he walked.