Being an only child is a disease in itself.

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

Education has now become the chief problem of the world, its one holy cause. The nations that see this will survive, and those that fail to do so will slowly perish. . . . There must be re-education of the will and of the heart as well as of the intellect; and the ideals of service must supplant those of selfishness and greed.

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

Precisely what menstruation is, is not yet very well known.

There is no more wild, free, vigorous growth of the forest, but everything is in pots or rows like a rococo garden... The pupil is in the age of spontaneous variation which at no period of life is so great. He does not want a standardized, overpeptonized mental diet. It palls on his appetite.