Men are now proud of belonging to a conquering nation, and without a murmur they lay down their persons and their wealth, if by so doing they may fend off subjection.

Each of us is in fact what he is almost exclusively by virtue of his imitative-ness.

The self-same atoms which, chaotically dispersed, made the nebula, now, jammed and temporarily caught in peculiar positions, form our brains; and the 'evolution' of brains, if understood, would be simply the account of how the atoms came to be so caught and jammed.

The work that leads to a doctor's degree is a constant temptation to sacrifice one's growth as a man to one's growth as a specialist.

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 greatest weapon against stress is our ability to choose one thought over another.

A winner's attitude: it may be difficult, but it's possible. A loser's attitude: It may be possible, but it's too difficult.