Without initiation into the scientific spirit one is not in possession of the best tools which humanity has so far devised for effectively directed reflection. One in that case not merely conducts inquiry and learning without the use of the best instruments, but fails to understand the full meaning of knowledge.

The bad man is the man who no matter how good he has been is beginning to deteriorate, to grow less good. The good man is the man who no matter how morally unworthy he has been is moving to become better. Such a conception makes one severe in judging himself and humane in judging others.

Liberty is not just an idea, an abstract principle. It is power, effective power to do specific things. There is no such thing as liberty in general; liberty, so to speak, at large.

A child may have to be snatched with roughness away from a fire so that he shall not be burnt.

The 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.

No thought, no idea, can possibly be conveyed as an idea from one person to another. When it is told it is to the one to whom it is told another fact, not an idea. The communication may stimulate the other person to realize the question for himself and to think out a like idea, or it may smother his intellectual interest and suppress his dawning effort at thought. But what he directly gets cannot be an idea. Only by wrestling with the conditions of the problem at first hand, seeking and finding his own way out, does he think.

Teaching may be compared to selling commodities. No one can sell unless somebody buys.