"Vivir con miedo es como vivir a medias. (A life lived in fear is a life half lived.)"
"I will act as if what I do makes a difference."
"Most people, sometime in their lives, stumble across the truth. Most jump up, brush themselves off, and hurry on about their business as if nothing happened."
West of Eden by Harry Harrison. What might have been if the dinosaur extinction event never happened.
Collapse: How Societies Choose to Fail or Succeed by Jared Diamond.
The Tibetan Book of Living and Dying by Sogyal Rinpoche.