^{4 Ref} One who says, "I know him," and doesn't keep his commandments, is a liar, and the truth isn't in him.

^{5 Ref} But whoever keeps his word, God's love has most assuredly been perfected in him. This is how we know that we are in him:

^{6 Ref} he who says he remains in him ought himself also to walk just like he walked.