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

Psychology is the science of the intellects, characters and behavior of animals including man.

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

The restriction of studies of human intellect and character to studies of conscious states was not without influence on a scientific studies of animal 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.

Science doesn't in the slightest depend on trust. It depends completely on the belief that you can demonstrate something for yourself.