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3By this we know that we have come to know Him, if we keep His commandments. 4The one who says, “I have come to know Him,” and does not keep His commandments, is a liar, and the truth is not in him; 5but whoever follows His word, in him the love of God has truly been perfected. By this we know that we are in Him: 6the one who says that he remains in Him ought, himself also, to walk just as He walked.
7Beloved, I am not writing a 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. 8On the other hand, I am writing a new commandment to you, which is true in Him and in you, because the darkness is passing away and the true Light is already shining.