It is wrong always, everywhere, and for everyone, to believe anything upon insufficient evidence.

We with our lives are like islands in the sea, or like trees in the forest... But the trees also commingle their roots in the darkness underground.

Emotional occasions, especially violent ones, are extremely potent in precipitating mental rearrangements. The sudden and explosive ways in which love, jealousy, guilt, fear, remorse, or anger can seize upon one are known to everybody. . . . And emotions that come in this explosive way seldom leave things as they found them.

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.

To know psychology, therefore, is absolutely no guarantee that we shall be good teacher.

As a rule reading fiction is as hard to me as trying to hit a target by hurling feathers at it. I need resistance to celebrate!

Truth lives, in fact, for the most part on a credit system. Our thoughts and beliefs pass, so long as nothing challenges them, just as bank-notes pass so long as nobody refuses them.