Peace is not absence of conflict, it is the ability to handle conflict by peaceful means.
1.
Whosoever hateth his brother is a murderer: and ye know that no murderer hath eternal life abiding in him.
2.
Hereby perceive we the love of God, because he laid down his life for us: and we ought to lay down our lives for the brethren.
3.
We love him, because he first loved us.