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.
To the intelligent man with an interest in human nature it must often appear strange that so much of the energy of the scientific world has been spent on the study of the body and so little on the study of the mind.
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.
Amongst the minds of animals that of man leads, not as a demigod from another planet, but as a king from the same race.
From the lowest animals of which we can affirm intelligence up to man this type of intellect is found.
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.
Nowhere more truly than in his mental capacities is man a part of nature.
Psychology is the science of the intellects, characters and behavior of animals including man.