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.

Wisdom is meaningless until your own experience has given it meaning, and 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.

Freedom of speech and freedom of action are meaningless without freedom to think. And there is no freedom of thought without doubt.

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

Words are one of our chief means of adjusting to all the situations of life. The better control we have over words, the more successful our adjustment is likely to be.

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.