Great cultural changes begin in affectation and end in routine.

Of course, clothing fashions have always been impractical, except in Tahiti.

In ordinary speech the words perception and sensation tend to be used interchangeably, but the psychologist distinguishes. Sensations are the items of consciousness--a color, a weight, a texture--that we tend to think of as simple and single. Perceptions are complex affairs that embrace sensation together with other, associated or revived contents of the mind, including emotions.

It is always some illusion that creates disillusion, especially in the young, for whom the only alternative to perfection is cynicism.

Vanity is a static thing. It puts it faith in what it has, and is easily wounded. Pride is active, and satisfied only with what it can do, hence accustomed not to feel small stings.

It is not clear to anyone, least of all the practitioners, how science and technology in their headlong course do or should influence ethics and law, education and government, art and social philosophy, religion and the life of the affections. Yet science is an all-pervasive energy, for it is at once a mode of thought, a source of strong emotion, and a faith as fanatical as any in history.

Of true knowledge at any time, a good part is merely convenient, necessary indeed to the worker, but not to an understanding of his subject: One can judge a building without knowing where to buy the bricks; one can understand a violin sonata without knowing how to score for the instrument. The work may in fact be better understood without a knowledge of the details of its manufacture, of attention to these tends to distract from meaning and effect.