My little children, I am writing this to you so that you may not sin; but if any one does sin, we have an advocate with the Father, Jesus Christ the righteous;
and he is the expiation for our sins, and not for ours only but also for the sins of the whole world.
And by this we may be sure that we know him, if we keep his commandments.
He who says "I know him" but disobeys his commandments is a liar, and the truth is not in him;
but whoever keeps his word, in him truly love for God is perfected. By this we may be sure that we are in him:
he who says he abides in him ought to walk in the same way in which he walked.
Beloved, I am writing you no new commandment, but an old commandment which you had from the beginning; the old commandment is the word which you have heard.
Yet I am writing you a new commandment, which is true in him and in you, because the darkness is passing away and the true light is already shining.
He who says he is in the light and hates his brother is in the darkness still.
Revised Standard Version of the Bible, copyright 1952 [2nd edition, 1971] by the Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved. (Revised Standard Version - Holy Bible)