"The byproduct is sometimes more valuable than the product."

“Charm"—which means the power to effect work without employing brute force—is indispensable to women. Charm is a woman's strength just as strength is a man's charm.”

“The mathematician has reached the highest rung on the ladder of human thought.”

“The omnipresent process of sex, as it is woven into the whole texture of our man's or woman's body, is the pattern of all the process of our life.”

“The greatest task before civilization at present is to make machines what they ought to be, the slaves, instead of the masters of men.”

“If men and women are to understand each other, to enter into each other's nature with mutual sympathy, and to become capable of genuine comradeship, the foundation must be laid in youth.”

“'Homosexual' is a barbarously hybrid word, and I claim no responsibility for it.”