Being an only child is a disease in itself.

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

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

Daily contact with some teachers is itself all-sided ethical education for the child without a spoken precept. Here, too, the real advantage of male over female teachers,especially for boys, is seen in their superior physical strength,which often, if highly estimated, gives real dignity and commands real respect, and especially in the unquestionably greater uniformity of their moods and their discipline.

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

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.

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