The fixed person for the fixed duties who in older societies was such a godsend, in future will be a public danger.

All practical teachers know that education is a patient process of mastery of details, minute by minute, hour by hour, day by day.

Nobody has a right to speak more clearly than he thinks.

To come very near to a true theory, and to grasp its precise application, are two different things, as the history of science teaches us. Everything of importance has been said before by someone who did not discover it.

The tragedy of the world is that those who are imaginative have but slight experience, and those who are experienced have feeble imaginations.

No science can be more secure than the unconscious metaphysics which tacitly it presupposes.

Human life is driven forward by its dim apprehension of notions too general for its existing language.