"A good plan will therefore include alternative actions, the choice between them being left open until the passage of time indicates which is feasible and which is not."

“I shall here present the view that numbers, even whole numbers, are words, parts of speech, and that mathematics is their grammar. Numbers were therefore invented by people in the same sense that language, both written and spoken, was invented. Grammar is also an invention. Words and numbers have no existence separate from the people who use them. Knowledge of mathematics is transmitted from one generation to another, and it changes in the same slow way that language changes. Continuity is provided by the process of oral or written transmission.”

“Most of us are unaware of our deep-seated faith in numbers.”

“Hunting is doing business with animals.”

“If we are to control our own future, it will be necessary, not only to obtain the cooperation of people, but to prepare comprehensive plans for that future.”

“Each community has a curious and distorted image of itself which is always flattering.”

“In order to arrive to a more realistic view of society, it must be recognized that there are individual differences that cannot be eradicated by the most rigid curriculum, and that various individuals will choose different educational curricula if allowed to do so.”