An idea is a method of evading, circumventing or surmounting through reflection, obstacles that otherwise would have to be attacked by brute force.

It is difficult to connect general principles with such thoroughly concrete things as children.

Every teacher should realize the dignity of his calling.

Every one of the constituent elements of a social group, in a modern city as in a savage tribe, is born immature, helpless, without language, beliefs, ideas, or social standards. Each individual, each unit who is the carrier of the life-experience of his group, in time passes away. Yet the life of the group goes on.

In laying hands upon the sacred ark of absolute permanency, in treating the forms that had been regarded as types of fixity and perfection as originating and passing away, the Origin of Species introduced a mode of thinking that in the end was bound to transform the logic of knowledge, and hence the treatment of morals, politics, and religion.

No system has ever as yet existed which did not in some form involve the exploitation of some human beings for the advantage of others.

Were all instructors to realize that the quality of mental process, not the production of correct answers, is the measure of educative growth something hardly less than a revolution in teaching would be worked.