"it's a good idea to review past mistakes before committing new ones."

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When I was 9, I saw a wrestler on television named Gorgeous George. He said, "I'm beautiful. I'm so pretty that if a sucker touches my face, I'll kill him. If he messes with my hair, I'll pummel him." I said to myself, "That's a good idea. I am the greatest, I'm pretty." And then I took it a little further than he did.

— Muhammad Ali