To study the abnormal is the best way of understanding the normal.

The strenuous life tastes better

Our ideas must agree with realities, be such realities concrete or abstract

The entire routine of our memorized acquisitions, for example, is a consequence of nothing but the Law of Contiguity. The words of a poem, the formulas of trigonometry, the facts of history, the properties of material things, are all known to us as definite systems or groups of objects which cohere in an order fixed by innumerable iterations, and of which any one part reminds us of the others.

What excites and interests the looker-on at life, what the romances and the statues celebrate, and the grim civic monuments remind us of, is the everlasting battle of the powers of light with those of darkness; with heroism reduced to its bare chance, yet ever and anon snatching victory from the jaws of death.

In the acquisition of a new habit, or the leaving off of an old one, we must take care to launch ourselves with as strong and decided an initiative as possible.

All the higher, more penetrating ideals are revolutionary. They present themselves far less in the guise of effects of past experience than in that of probable causes of future experience, factors to which the environment and the lessons it has so far taught us must learn to bend.