Denying realism amounts to megalomania.

Whenever a theory appears to you as the only possible one, take this as a sign that you have neither understood the theory nor the problem which it was intended to solve.

No rational argument will have a rational effect on a man who does not want to adopt a rational attitude.

While differing widely in the various little bits we know, in our infinite ignorance we are all equal.

It is complete nihilism to propose laying down arms in a world where atom bombs are around. It is very simple: there is no way of achieving peace other than with weapons.

No book can ever be finished. While working on it we learn just enough to find it immature the moment we turn away from it

Science may be described as the art of systematic oversimplification.

What we need and what we want is to moralize politics, not to politicize morals.

Always remember that it is impossible to speak in such a way that you cannot be misunderstood: there will always be some who misunderstand you.

We can all participate in the heritage of man. We all can help to preserve it. And we can all make our own modest contribution to it.We must not as for more.

A bird doesn’t sing because it has an answer, it sings because it has a song.

Age is just reality we create for ourselves.

With determination and hard work, you will grow to a position capable of advising others.

What kind of country has this become? Decent people can’t do anything without being watched.

Structure is more important than content in the transmission of information.

The moralist is the person who tells people that they ought to be unselfish, when they still feel like egos, and his efforts are always and invariably futile.

They all wait impatiently for the blessed cloak of darkness to cover their wretched little deeds, but the sun will not be hurried by the whims of men.

I'm not going to leave Canada, I'm going to fix it.

Not now, or not there, or too much, or not at all.

Any film is about heroism: the triumph of good over evil. If you look back at my films, you will see that as a recurring theme.