One of the chief things which my typical man has to learn is that the mental faculties are capable of a continuous hard activity; they do not tire like an arm or a leg. All they want is change - not rest, except in sleep.

As a rule people don't collect books; they let books collect themselves.

All wrong doing is done in the sincere belief that it is the best thing to do.

Your own mind is a sacred enclosure into which nothing harmful can enter except by your permission.

A sense of the value of time... is an essential preliminary to efficient work; it is the only method of avoiding hurry.

Its language is a language which the soul alone understands, but which the soul can never translate.

You can only acquire really useful general ideas by first acquiring particular ideas . . . You cannot make bricks without straw.