Systems, scientific or philosophic, come and go. Each method of limited understanding is at length exhausted. In its prime each system is a triumphant success: in its decay it is an obstructive nuisance.

Algebra reverses the relative importance of the factors in ordinary language.

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.

Education should turn out the pupil with something he knows well and something he can do well.

Heaven knows what seeming nonsense may not tomorrow be demonstrated truth.

Civilization advances by extending the number of important operations which we can perform without thinking of them.

The task of a university is the creation of the future, so far as rational thought and civilized modes of appreciation can affect the issue.