The voice of the intellect is a soft one, but it does not rest until it has gained a hearing.

America is the most grandiose experiment the world has seen, but, I am afraid, it is not going to be a success.

There are no mistakes.

[The child] takes his play very seriously and he expends large amounts of emotion on it. The opposite of play is not what is serious but what is real.

It is always possible to bind together a considerable number of people in love, so long as there are other people left over to receive the manifestations of their aggressiveness.

Civilized society is perpetually menaced with disintegration through this primary hostility of men towards one another.

Humanity is in the highest degree irrational, so that there is no prospect of influencing it by reasonable arguments. Against prejudice one can do nothing.