Americans cannot realize how many chances for mental improvement they lose by their inveterate habit of keeping six conversations when there are twelve in the room.

Prejudices subsist in people's imagination long after they have been destroyed by their experience.

A book, like a landscape, is a state of consciousness varying with readers.

Learn to attack things frontally but according to the most scientific methods.

Every now and then we discover in the seething mass of humanity round us a person who does not seem to need anybody else, and the contrast with ourselves is stinging.

The object of reflection is invariably the discovery of something satisfying to the mind which was not there at the beginning of the search.

Ideas are the roots of creation.