In politics, yesterday's lie is attacked only to flatter today's.

Somebody told me I should put a pebble in my mouth to cure my stuttering. Well, I tried it, and during a scene I swallowed the pebble. That was the end of that.

A body of work such as Pasteur's is inconceivable in our time: no man would be given a chance to create a whole science. Nowadays a path is scarcely opened up when the crowd begins to pour in.

We spend our time envying people whom we wouldn't wish to be.

My pessimism extends to the point of even suspecting the sincerity of other pessimists.

Kill one man, and you are a murderer. Kill millions of men, and you are a conqueror. Kill them all, and you are a god.

Kill one man, and you are murderer.

Science has made us gods even before we are worthy of being men.

To be adult is to be alone.

A man is not old as long as he is seeking something.

In order to remain true to oneself one ought to renounce one's party three times a day.

You have a destiny, you are a human of intrinsic value, you were born to fulfil a mission

You know, Jacob, if it weren’t for the fact that we’re natural enemies and that you’re also trying to steal away the reason for my existence, I might actually like you.

Someone who normally moved so slowly, this time, for once, was long gone.

I exercise hard and the reason I do is so that I can earn the things I like to consume.

The point of having a director is that they make the final decision; it's their point of view, they set the rhythm and they make the final decisions.

Difficulties seldom defeat people; lack of faith in themselves usually does it.

A good action is never lost; it is a treasure laid up and guarded for the doer's need.

Whatever happens in your life, joyful or painful, do not be swept away by reactivity. Be patient with yourself and don't lose your sense of perspective.

Doubt is clearly a value in science. It is important to doubt and that the doubt is not a fearful thing, but a thing of great value.

My character - and for that matter my worst habits - could only be described by someone else. You can't open a box with the crowbar inside it.