One must require from each one the duty which each one can perform. Accepted authority rests first of all on reason.

I know but one freedom and that is the freedom of the mind.

Once men are caught up in an event, they cease to be afraid. Only the unknown frightens men.

When we think that the machine will harm man, then it is perhaps because we are not yet capable of judging the rapid changes it has brought about. We hardly feel at home in this landscape of mines and power stations. We have just moved into this new home that we have not even finished yet. Everything around us has changed so fast - personal relations, working conditions, habits. Even our state of mind is in turmoil.

How desperately difficult it is to be honest with oneself. It is much easier to be honest with other people.What is true is invisible to the eye. It is only with the heart that one can see clearly.

One is a member of a country, a profession, a civilization, a religion. One is not just a man.

Although human life is priceless, we always act as if something had an even greater price than life... but what is that something?