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.

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

Of all work-schools, a good farm is probably the best for motor development.

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

Oneness with Nature is the glory of childhood; oneness with childhood is the glory of the Teacher.

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.

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