What a distressing contrast there is between the radiant intelligence of the child and the feeble mentality of the average adult.

The time comes when each of us has to give up as illusions the expectations which, in his youth, he pinned upon his fellow-men, and when he may learn how much difficulty and pain has been added to his life by their ill-will.

The communal life of human beings had . . . a two-fold foundation: the compulsion to work, which was created by external necessity, and the power of love.

Cruelty and intolerance to those who do not belong to it are natural to every religion.

None believes in his own death. In the unconscious everyone is convinced of his own immortality.

Love can not be much younger than the lust for murder.

When the wayfarer whistles in the dark, he may be disavowing his timidity, but he does not see any the more clearly for doing so.