Knowledge is not simply another commodity. On the contrary. Knowledge is never used up. It increases by diffusion and grows by dispersion.

It is very unlikely that the computer will displace the books, except in areas where we need information speedily.

Disagreement produces debate but dissent produces dissension.

We must abandon the prevalent belief in the superior wisdom of the ignorant.

A best-seller was a book which somehow sold well because it was selling well.

History had been man's effort to accomodate himself to what he could not do. Amereican history in the 20th century would, more than ever before, test man's ability to accomodate himself to all the new things he could do.

Climaxing a movement for calendar reform which had been developing for at least a century, in 1582 Pope Gregory ordained that October 4 was to be followed by October 15.