Adolescence is when the very worst and best impulses in the human soul struggle against each other for possession.

Adolescence as the time when an individual ‘recapitulates’ the savage stage of the race’s past.

The teens are emotionally unstable and pathic. It is a natural impulse to experience hot and perfervid psychic states, and it is characterized by emotionalism. We see here the instability and fluctuations now so characteristic. The emotions develop by contrast and reaction into the opposite.

Abundance and vigor of automatic movements are desirable, and even a considerable degree of restlessness is a good sign in young children.

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.

Civilization is so hard on the body that some have called it a disease, despite the arts that keep puny bodies alive to a greater average age, and our greater protection from contagious and germ diseases.

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