The civilized man has a moral obligation to be skeptical. . . . Any man who for one moment abandons or suspends the questioning spirit has for that moment betrayed humanity.

The mere abhorrence of vice is not a virtue at all.

Wisdom is meaningless until your own experience has given it meaning, and there is wisdom in the selection of wisdom.

There is no necessary connection between the desire to lead and the ability to lead, and even less the ability to lead somewhere that will be to the advantage of the led.

We see what we want to see, and observation conforms to hypothesis.

There is wisdom in the selection of wisdom.

Many studies have established the fact that there is a high correlation between vocabulary and intelligence and that the ability to increase one's vocabulary throughout life is a sure reflection of intellectual progress.