“Life is opinion.”

Remembrance Rock (1948), Ch. 2, p. 7
Context: A baby is God's opinion that life should go on. A book that does nothing to you is dead. A baby, whether it does anything to you, represents life. If a bad fire should break out in this house and I had my choice of saving the library or the babies, I would save what is alive. Never will a time come when the most marvelous recent invention is as marvelous as a newborn baby. The finest of our precision watches, the most super-colossal of our supercargo plants, don't compare with a newborn baby in the number and ingenuity of coils and springs, in the flow and change of chemical solutions, in timing devices and interrelated parts that are irreplaceable. A baby is very modern. Yet it is also the oldest of the ancients. A baby doesn't know he is a hoary and venerable antique — but he is. Before man learned how to make an alphabet, how to make a wheel, how to make a fire, he knew how to make a baby — with the great help of woman, and his God and Maker.

Source: What is Political Philosophy (1959), p. 91

Source: The (Mis)Behavior of Markets (2004, 2008), Ch. 7, p. 125
Context: Contrary to popular opinion, mathematics is about simplifying life, not complicating it. A child learns a bag of candies can be shared fairly by counting them out: That is numeracy. She abstracts that notion to dividing a candy bar into equal pieces: arithmetic. Then, she learns how to calculate how much cocoa and sugar she will need to make enough chocolate for fifteen friends: algebra.

Source: Q is for Quarry

Book I, Ch. 40. Of Good and Evil
Essais (1595), Bartlett's Familiar Quotations, 10th ed. (1919)

Source: Skin in the Game (2018), p. 185

Rogers Commission Report (1986)
Context: It appears that there are enormous differences of opinion as to the probability of a failure with loss of vehicle and of human life. The estimates range from roughly 1 in 100 to 1 in 100,000. The higher figures come from the working engineers, and the very low figures from management. What are the causes and consequences of this lack of agreement? Since 1 part in 100,000 would imply that one could put a Shuttle up each day for 300 years expecting to lose only one, we could properly ask "What is the cause of management's fantastic faith in the machinery?"
We have also found that certification criteria used in Flight Readiness Reviews often develop a gradually decreasing strictness. The argument that the same risk was flown before without failure is often accepted as an argument for the safety of accepting it again. Because of this, obvious weaknesses are accepted again and again, sometimes without a sufficiently serious attempt to remedy them, or to delay a flight because of their continued presence.

Derby v. Ouseley (1856), 4 W. R. 464.

“An Unprejudiced Mind,” p. 311
Pretexts: Reflections on Literature and Morality (1964)