1 John 2:3-6 WYC

3 And in this thing we know, that we know him, if we keep his commandments.
4 He that saith that he knoweth God, and keepeth not his commandments, is a liar, and truth is not in him.
5 But the charity of God is perfect verily in him, that keepeth his word [Forsooth who keepeth his word, verily in him is perfect charity]. In this thing we know, that we be in him, if we be perfect in him.
6 He that saith, that he dwelleth in him, he oweth to walk, as he walked.