Psychology helps to measure the probability that an aim is attainable.

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

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

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

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.

Colors fade, temples crumble, empires fall, but wise words endure.