“If I hit you and you hit me and I hit you back and you hit me back and go on, you see, that goes on ad infinitum. It just never ends. Somewhere somebody must have a little sense, and that’s the strong person.”
1950s, Loving Your Enemies (November 1957)
Context: I think the first reason that we should love our enemies, and I think this was at the very center of Jesus’ thinking, is this: that hate for hate only intensifies the existence of hate and evil in the universe. If I hit you and you hit me and I hit you back and you hit me back and go on, you see, that goes on ad infinitum. It just never ends. Somewhere somebody must have a little sense, and that’s the strong person. The strongperson is the person who can cut off the chain of hate, the chain of evil. And that is the tragedy of hate, that it doesn’t cut it off. It only intensifies the existence of hate and evil in the universe. Somebody must have religion enough and morality enough to cut it off and inject within the very structure of the universe that strong and powerful element of [[love].
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Martin Luther King, Jr. 658
American clergyman, activist, and leader in the American Ci… 1929–1968Related quotes
Source: Plan B: Further Thoughts on Faith

I found this to be true.
Kingston, p. 8
Vokes - My Story (1985)
“Forgiveness means it finally becomes unimportant that you hit back.”

Circa 1970, '71 or '72; as quoted by Blass in A Pirate for Life https://books.google.com/books?id=NfLFdUrYpH8C&pg=PT146&dq=%22I+will+hit+the+freaking+ball+to+Harrisburg%22&hl=en&sa=X&ved=0ahUKEwiC8tLNxIrVAhVGWz4KHY_XBWUQ6AEIJDAA#v=onepage&q=%22I%20will%20hit%20the%20freaking%20ball%20to%20Harrisburg%22&f=false (2012) by Blass and Erik Sherman
Baseball-related, <big><big>1970s</big></big>
Variant: Blass, I'm going to tell you something: You pitch me inside, I hit the ball to Harrisburg.