The great thing, then, in all education, is to make our nervous system our ally instead of our enemy.

What every genuine philosopher (every genuine man, in fact) craves most is praise although the philosophers generally call it recognition!

Life shall be built in doing and suffering and creating.

All that we need explicitly to note is that, the more the passive attention is relied on, by keeping the material interesting; and the less the kind of attention requiring effort is appealed to; the more smoothly and pleasantly the classroom work goes on.

The perfection of rottenness.

When you have broken the reality into concepts you never can reconstruct it in its wholeness.

Our theories are wedged and controlled as nothing else is. Yet sometimes alternative theoretic formulas are equally compatible with all the truths we know, and then we choose between them for subjective reasons. We choose the kind of theory to which we are already partial: we follow 'elegenace' or 'economy'