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.

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

The un-conscious distortion of the facts is almost harmless compared to the unconscious neglect of an animal's mental life until it verges on the unusual and marvelous.

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

On the whole, the psychological work of the last quarter of the nineteenth century emphasized the study of consciousness to the neglect of the total life of intellect and character

For origin and development of human faculty we must look to these processes of association in lower animals.

The real difference between a man's scientific judgments about himself and the judgment of others about him is he has added sources of knowledge.