“Adapt or perish, now as ever, is nature's inexorable imperative.”

“Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth.”

“It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts.”

“The crisis of today is the joke of tomorrow.”

“Human history becomes more and more a race between education and catastrophe.”