“Never hate your enemies. It affects your judgment.”
Source: The Godfather
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Mario Puzo 53
American Novelist 1920–1999Related quotes

“Never give your enemies any more reason than they already have to go on hating you.”
Johnson, James W. (2002). Arizona Politicians: The Noble and the Notorious, illustrations by David `Fitz' Fitzsimmons, Tucson: University of Arizona Press. pp 149-150. ISBN 0-8165-2203-0.

“Hate your enemies
Save your friends
Find your place
Speak the truth.”
Radio Friendly Unit Shifter.
Song lyrics, In Utero (1993)

The Way of God's Will Chapter 1-7. Judgement http://www.unification.org/ucbooks/WofGW/wogw1-07.htm Translated 1980.

1950s, Loving Your Enemies (November 1957)
Context: Now there is a final reason I think that Jesus says, "Love your enemies." It is this: that love has within it a redemptive power. And there is a power there that eventually transforms individuals. That’s why Jesus says, "Love your enemies." Because if you hate your enemies, you have no way to redeem and to transform your enemies. But if you love your enemies, you will discover that at the very root of love is the power of redemption. You just keep loving people and keep loving them, even though they’re mistreating you. Here’s the person who is a neighbor, and this person is doing something wrong to you and all of that. Just keep being friendly to that person. Keep loving them. Don’t do anything to embarrass them. Just keep loving them, and they can’t stand it too long. Oh, they react in many ways in the beginning. They react with bitterness because they’re mad because you love them like that. They react with guilt feelings, and sometimes they’ll hate you a little more at that transition period, but just keep loving them. And by the power of your love they will break down under the load. That’s love, you see. It is redemptive, and this is why Jesus says love. There’s something about love that builds up and is creative. There is something about hate that tears down and is destructive. So love your enemies.

The Notebooks of Leonardo da Vinci (1883), XIX Philosophical Maxims. Morals. Polemics and Speculations.

Source: Locksley Hall Sixty Years After (1886), Line 85

“Forgive your enemies, but never forget their names.”
As quoted in Mayor (1984) by Ed Koch
Attributed

“You never know which people will affect your life.”
Source: D is for Deadbeat