Scientific principles and laws do not lie on the surface of nature. They are hidden, and must be wrested from nature by an active and elaborate techn… - John Dewey

An intelligent home differs from an unintelligent one chiefly in that the habits of life and intercourse which prevail are chosen, or at least colored, by the thought of their bearing upon the development of children.

The psychologist, in his most remote and technical occupation with mechanism, is contributing his bit to that ordered knowledge which alone enables mankind to secure a larger and to direct a more equal flow of values in life.

The utmost possible regarding an individual is a statement as to some order of probability about the future. Heisenberg's principle has been seized upon as a basis for wild statements to the effect that the doctrine of arbitrary free will and totally uncaused activity are now scientifically substantiated. Its actual force and significance is generalization of the idea that the individual is a temporal career whose future cannot logically be deduced from its past.