The essence of life is doing things for their own sakes.

In a logically perfect language, there will be one word and no more for every simple object, and everything that is not simple will be expressed by a combination of words, by a combination derived, of course, from the words for the simple things that enter in, one word for each simple component.

The man who pursues happiness wisely will aim at the possession of a number of subsidiary interests in addition to those central ones upon which his life is built.

It is in our hearts that evil lies, and it is from our hearts that it must be plucked out.

To be able to concentrate for a considerable time is essential to difficult achievement.

A happy life must be to a great extent a quiet life, for it is only in an atmosphere of quiet that true joy dare live.

Modern technique has made it possible for leisure, within limits, to be not the prerogative of small privileged classes, but a right evenly distributed throughout the community. The morality of work is the morality of slaves, and the modern world has no need of slavery.