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

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

Human beings are accustomed to think of intellect as the power of having and controlling ideas and of ability to learn as synonymous with ability to have ideas. But learning by having ideas is really one of the rare and isolated events in nature.

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 weal.

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.