The teens are emotionally unstable and pathic. It is a natural impulse to experience hot and perfervid psychic states, and it is characterized by emotionalism. We see here the instability and fluctuations now so characteristic. The emotions develop by contrast and reaction into the opposite.

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

Being an only child is a disease in itself.

Man is largely a creature of habit, and many of his activities are more or less automatic reflexes from the stimuli of his environment.

Adolescence is a new birth, for the higher and more completely human traits are now born.

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

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