I wished by treating Psychology like a natural science, to help her become one.

Is life worth living? It all depends on the liver.

I am well aware how odd it must seem to some of you to hear me say that an idea is true so long as to believe it is profitable to our lives

Compared with men, it is probable that brutes neither attend to abstract characters, nor have associations by similarity. Their thoughts probably pass from one concrete object to its habitual concrete successor far more uniformly than is the case with us. In other words, their associations of ideas are almost exclusively by contiguity. So far, however, as any brute might think by abstract characters instead of by association of con cretes, he would have to be admitted to be a reasoner in the true human sense. How far this may take place is quite uncertain.

The mind of your own enemy, the pupil, is working away from you, as keenly and eagerly as is the mind of the commander on the other side from the scientific general. Just what the respective enemies want and think, and what they know or do not know, are as hard things for the teachers as for the general to find out.

Could the young but realize how soon they will become mere walking bundles of habits, they would give more heed to their conduct while in the plastic state.

You must bring out of each word its practical cash-value, set it at work within the stream of your experience.