1 John 2:9-11

Anyone who says, “I am in the light,” while holding hatred in his heart toward a fellow believer is still in the darkness. But the one who truly loves a fellow believer lives in the light, and there is nothing in him that will cause someone else to stumble. But whoever hates a fellow believer lives in the darkness—stumbling around in the dark with no clue where he is going, for he is blinded by the darkness.