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

Modern man was not meant to do his best work before forty but is by nature, and is becoming more so, an afternoon and evening worker.

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.

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

.. 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.

This splendid subject [mathematics], queen of all exact sciences, and the ideal and norm of all careful thinking.