1 John 2:11

2:11 But the one who hates his fellow Christian is in the darkness, walks in the darkness, and does not know where he is going, because the darkness has blinded his eyes.

1 John 3:14

3:14 We know that we have crossed over from death to life because we love our fellow Christians. The one who does not love remains in death.

1 John 3:16

3:16 We have come to know love by this: that Jesus laid down his life for us; thus we ought to lay down our lives for our fellow Christians.