“The principle of the lever is the same as that of the balance, and the lever is only a balance in which the arms are not equal.”

“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.”

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

“The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but 'That's funny...”