Men are not gentle, friendly creatures wishing for love, who simply defend themselves if they are attacked, but ... a powerful measure of desire for aggression had to be reckoned as part of their instinctual endowment.

He does not believe that does not live according to his belief.

Life as we find it is too hard for us; it entails too much pain, too many disappointments, impossible tasks. We cannot do without palliative remedies.

I regard myself as one of the most dangerous enemies of religion

Innately, children seem to have little true realistic anxiety. They will run along the brink of water, climb on the window sill, play with sharp objects and with fire, in short, do everything that is bound to damage them and to worry those in charge of them, that is wholly the result of education; for they cannot be allowed to make the instructive experiences themselves.

What progress we are making. In the Middle Ages they would have burned me. Now they are content with burning my books.

A love that does not discriminate seems to me to forfeit a part of its own value, by doing an injustice to its object; and secondly, not all men are worthy of love.