Just as the science and art of agriculture depend upon chemistry and botany, so the art of education depends upon physiology and psychology.

This growth in the number, speed of formation, permanence, delicacy and complexity of associations possible for an animal reaches its acme in the case of man.

Human education is concerned with certain changes in the intellects, characters and behavior of men, its problems being roughly included under these four topics: Aims, materials, means and methods.

From the lowest animals of which we can affirm intelligence up to man this type of intellect is found.

So the animal finally performs in that situation only the fitting act.

The intellectual evolution of the race consists in an increase in the number, delicacy, complexity, permanence and speed of formation of such associations.

Nowhere more truly than in his mental capacities is man a part of nature.