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.

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

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

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

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

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.