Almost all new ideas have a certain aspect of foolishness when they are first produced.

Whenever a text-book is written of real educational worth, you may be quite certain that some reviewer will say that it will be difficult to teach from it. Of course it will be difficult to teach from it. It it were easy, the book ought to be burned.

From the moment of birth we are immersed in action, and can only fitfully guide it by taking thought.

Aristotle discovered all the half-truths which were necessary to the creation of science.

The race that does not value trained intelligence is doomed.

Art is the imposing of a pattern on experience.

Rightness of limitation is essential for growth of reality.