1 John 2:7-11

7Beloved, I am not writing to you a new commandment, but an old one, which you have had from the beginning. This commandment is the message you have heard. 8Then again, I am also writing to you a new commandment, which is true in Him and also in you. For the darkness is fading and the true light is already shining.

9If anyone claims to be in the light but hates his brother, he is still in the darkness. 10Whoever loves his brother remains in the light, and there is no cause of stumbling in him. 11But whoever hates his brother is in the darkness and walks in the darkness. He does not know where he is going, because the darkness has blinded his eyes.