All that exists, exists in some amount and can be measured.

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

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

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

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

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

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.