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

Dogmatism is the anti-Christ of learning.

Seek simplicity, then distrust.

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.

Everything of importance has been said before by somebody who did not discover it.

Religion is what the individual does with his own solitariness.