1 John 2:5-7

New Revised Standard Version Catholic Edition

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.

A New Commandment

⁷ Beloved, I am writing you no new commandment, but an old commandment that you have had from the beginning; the old commandment is the word that you have heard.