When, instead of merely associating some act with some situation in the animal way, we think the situation out, we have a set of particular feelings of its elements.

Dogs get lost hundreds of times and no one ever notices it or sends an account of it to a scientific magazine.

The dog, on the other hand, has few or no ideas because his brain acts in coarse fashion and because there are few connections with each single process.

Whatever exists at all exists in some amount. To know it thoroughly involves knowing its quantity as well as its quality.

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.

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.

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