Stories you read when you're the right age never quite leave you. You may forget who wrote them or what the story was called. Sometimes you'll forget precisely what happened, but if a story touches you it will stay with you, haunting the places in your mind that you rarely ever visit.
Nothing in biology makes sense except in light of evolution
"The past is always with us, for it feeds the present."
Changing the destructive things you say to yourself when you experience the setbacks that life deals all of us is the central skill of optimism.