In the present state of the world, it is evident that the control we have gained of physical energies, heat, light, electricity, etc., without having first secured control of our use of ourselves is a perilous affair. Without the control of our use of ourselves, our use of other things is blind; it may lead to anything.
John DeweyThe empiric easily degenerates into the quack. He does not know where his knowledge begins or leaves off, and so when he gets beyond routine conditions he begins to pretend-to make claims for which there is no justification, and to trust to luck and to ability to impose upon others-to "bluff."
John DeweyThe Professor took the old practices and studied them, worked out their mechanical principles and then devised a graded scientific set of tricks, but is based on the elementary laws of mechanics, a study of the equilibrium of the human body, the ways in which it is disturbed, how to recover your own and take advantage of the shifting of the center of gravity of the other person. The first thing that is taught is how to fall down without being hurt, that alone is worth the price of admission and ought to be taught in all our gyms.
John Dewey