This splendid subject [mathematics], queen of all exact sciences, and the ideal and norm of all careful thinking.
G. Stanley HallAll possible truth is practical. To ask whether our conception of chair or table corresponds to the real chair or table apart from the uses to which they may be put, is as utterly meaningless and vain as to inquire whether a musical tone is red or yellow. No other conceivable relation than this between ideas and things can exist. The unknowable is what I cannot react upon. The active part of our nature is not only an essential part of cognition itself, but it always has a voice in determining what shall be believed and what rejected.
G. Stanley HallAdolescence is when the very worst and best impulses in the human soul struggle against each other for possession.
G. Stanley HallModern 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.
G. Stanley HallThe 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.
G. Stanley Hall