Some statements concern the conscious states of the animal, what he is to himself as an inner life; others concern his original and acquired ways of response, his behavior, what he is an outside observer

It will of course, be understood that directly or indirectly, soon or late, every advance in the sciences of human nature will contribute to our success in controlling human nature and changing it to the advantage of the common wheel.

Amongst the minds of animals that of man leads, not as a demigod from another planet, but as a king from the same race.

Human folk are as a matter of fact eager to find intelligence in animals.

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

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.

The dog, on the other hand, has few or no ideas because his brain acts in coarse fashion and because there are few connections with each single process.