Adolescence is a new birth, for the higher and more completely human traits are now born.

.. every step of the upward way is strewn with wreckage of body, mind, and morals.

Man is largely a creature of habit, and many of his activities are more or less automatic reflexes from the stimuli of his environment.

Muscles are in a most intimate and peculiar sense the organs of the will.

Constant muscular activity was natural for the child, and, therefore, the immense effort of the drillmaster teachers to make children sit still was harmful and useless.

Modern man was not meant to do his best work before forty but is by nature, and is becoming more so, an afternoon and evening worker.

Adolescence is a new birth, for the higher and more completely human traits are now born.