1st John 2:5

2 And he is the atoning sacrifice for our sins, and not for ours only, but also for the whole world.

3 This is how we know that we know him: if we keep his commandments.

4 He who says, "I know him," and doesn`t keep his commandments, is a liar, and the truth is not in him.

5 But whoever keeps his word, God`s love has most assuredly been perfected in him. This is how we know that we are in him:

6 he who says he remains in him ought himself also to walk just like he walked.

7 Brothers, I write no new commandment to you, but an old commandment which you had from the beginning. The old commandment is the word which you heard from the beginning.

8 Again, I write a new commandment to you, which thing is true in him and in you; because the darkness is passing away, and the true light already shines.