So the animal finally performs in that situation only the fitting act.

He who learns and runs away, lives to learn another day.

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.

The intellectual evolution of the race consists in an increase in the number, delicacy, complexity, permanence and speed of formation of such associations.

Some statements concern the conscious states of the animal, what he is to himself as an inner life; others concern his original and acquired ways of response, his behavior, what he is an outside observer

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.

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