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

The man of the future may, and even must, do things impossible in the past and acquire new motor variations not given by heredity.

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

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.

Puberty for a girl is like floating down a broadening river into an open sea.