1 John 2:1-6 CSB
My little children, I am writing you these things so that you may not sin. But if anyone does sin, we have an advocate with the Father — Jesus Christ the righteous one. He himself is the atoning sacrifice for our sins, and not only for ours, but also for those of the whole world.
This is how we know that we know him: if we keep his commands. The one who says, “I have come to know him,” and yet doesn’t keep his commands, is a liar, and the truth is not in him. But whoever keeps his word, truly in him the love of God is made complete. This is how we know we are in him: The one who says he remains in him should walk just as he walked.
CSB: Christian Standard Bible