What can I wish to the youth of my country who devote themselves to science? ...Thirdly, passion. Remember that science demands from a man all his life. If you had two lives that would not be enough for you. Be passionate in your work and in your searching.

The sciences do not try to explain, they hardly even try to interpret, they mainly make models. By a model is meant a mathematical construct which, with the addition of certain verbal interpretations, describes observed phenomena. The justification of such a mathematical construct is solely and precisely that it is expected to work.

Books must follow sciences, and not sciences books.

Science would be ruined if (like sports) it were to put competition above everything else, and if it were to clarify the rules of competition by withdrawing entirely into narrowly defined specialties. The rare scholars who are nomads-by-choice are essential to the intellectual welfare of the settled disciplines.

...a science is said to be useful if its development tends to accentuate the existing inequalities in the destribution of wealth, or more directly promotes the destruction of human life.

It is not fair to ask of others what you are unwilling to do yourself.

The avoidance of taxes is the only intellectual pursuit that still carries any reward.

That young girl is one of the least benightedly unintelligent organic life forms it has been my profound lack of pleasure not to be able to avoid meeting.

Over the past ten years, for the first time, intelligence had become socially correct for girls.

The intelligent man is one who has successfully fulfilled many accomplishments, and is yet willing to learn more.