What nutrition and reproduction are to physiological life, education is to social life.

As some species die out, forms better adapted to utilize the obstacles against which they struggled in vain come into being.

I believe that the only true education comes through the stimulation of the child's powers by the demands of the social situations in which he finds himself.

All of us have many habits of whose import we are quite unaware, since they were formed without our knowing what we were about. Consequently they possess us, rather than we them. They move us; they control us. Unless we become aware of what they accomplish, and pass judgment upon the worth of the result, we do not control them.

Every teacher should realize the dignity of his calling.

Every great advance in science has issued from a new audacity of imagination. What are now working conceptions, employed as a matter of course because they have withstood the tests of experiment and have emerged triumphant, were once speculative hypotheses.

The deepest urge in human nature is the desire to feel important.