Experience has taught me a technique for dealing with such people [...] I counter the devotees of the Great Pyramid by adoration of the Sphinx; and the devotee of nuts by pointing out that hazelnuts and walnuts are as deleterious as other foods and only Brazil nuts should be tolerated. But when I was younger I had not yet acquired this technique, with the result that my contacts with cranks were sometimes alarming.

Public opinion is always more tyrannical towards those who obviously fear it than towards those who feel indifferent to it.

More important than the curriculum is the question of the methods of teaching and the spirit in which the teaching is given

The immense majority of intellectually eminent men disbelieve in the Christian religion, but they conceal the fact in public, because they are afraid of losing their incomes.

Too little liberty brings stagnation, and too much brings chaos.

Only mathematics and mathematical logic can say as little as the physicist means to say.

The luxury to disparage freedom is the privilege of those who already possess it.