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.

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

The civilized man has a moral obligation to be skeptical, to demand the credentials of all statements that claim to be facts.

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

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.

There is wisdom in the selection of wisdom.

It (the dash ) is a comfortable punctuation mark since even the most rigorous critic can seldom claim that any particular example of it is a misuse. Its overuse is its greatest danger, and the writer who can't resist dashes may be suspected of uncoordinated thinking.

We may be through with the past, but the past is not through with us.

Authors are magpies, echoing each other's words and seizing avidly on anything that glitters.

Stoicism is the wisdom of madness and cynicism the madness of wisdom.