„Personal columnists … are jackals and no jackal has been known to live on grass once he had learned about meat — no matter who killed the meat for him.“

— Ernest Hemingway

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„Everyone knew there were wolves in the mountains, but they seldom came near the village - the modern wolves were the offspring of ancestors that had survived because they had learned that human meat had sharp edges.“
— Terry Pratchett
„A person who has been punished is not thereby simply less inclined to behave in a given way; at best, he learns how to avoid punishment.“
— B.F. Skinner
„He had lived a very long time, and only since he gained Anna had he learned to fear. He’d discovered that he had never been brave before—just indifferent. She had taught him that to be brave, you have to fear losing something.“
— Patricia Briggs