Intolerance of groups is often, strangely enough, exhibited more strongly against small differences than against fundamental ones.

When making a decision of minor importance, I have always found it advantageous to consider all the pros and cons.

Where does a thought go when it's forgotten?

Men have gained control over the forces of nature to such an extent that with their help they would have no difficulty exterminating one another to the last man. They know this, and hence comes a large part of their current unrest, their unhappiness and their mood of anxiety.

A string of reproaches against other people leads one to suspect the existence of a string of self-reproaches with the same content.

One feels inclined to say that the intention that man should be 'happy' is not included in the plan of Creation.' . . . We are so made that we can derive intense enjoyment only from a contrast and very little from a state of things.

We know less about the sexual life of little girls than of boys. But we need not feel ashamed of this distinction; after all, the sexual life of adult women is a 'dark continent' for psychology.