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

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

Every theory of love, from Plato down teaches that each individual loves in the other sex what he lacks in himself.

Normal children often pass through stages of passionate cruelty, laziness, lying and thievery.

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.

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

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