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.

That is the essence of a witch-hunt, that any questioning of the evidence or the procedures in itself constitutes proof of complicity.

For the most part our leaders are merely following out in front; they do but marshal us the way that we are going.

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

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

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