2 He is the atoning sacrifice for our sins, and not for ours only, but also for the sins of the whole world.
3 By this we know that we know Him, if we keep His commandments.
4 Whoever says, “I know Him,” and does not keep His commandments is a liar, and the truth is not in him.
5 But whoever keeps His word truly has the love of God perfected in him. By this we know we are in Him.
6 Whoever says he remains in Him ought to walk as He walked.
7 Brothers, I am writing no new commandment to you, but an old commandment which you have had from the beginning. The old commandment is the word which you have heard from the beginning.
8 Yet a new commandment I am writing to you, which holds true in Him and in you, because the darkness is passing away, and the true light is already shining.