"Guilt upon the conscience, like rust upon iron, both defiles and consumes it, gnawing and creeping into it, as that does which at last eats out the very heart and substance of the metal."

"It is necessary to have regard to the person whom we wish to persuade, of whom we must know the mind and the heart, what principles he acknowledges, what things he loves; and then observe in the thing…"

"Marriage for love is the beautifulest external symbol of the union of souls, marriage without it is the uncleanliest traffic that defiles the world."

"People thought I was a charlatan and a nut, . The doctors were against me — they said that working out with weights would give people heart attacks and they would lose their sex drive."

"See how involved it gets? Clover, bees, nitrogen, escape speed, power, plant-animal balance, gas laws, compound interest laws, meteorology—a mathematical ecologist has to think of everything and think…"