Samuel Johnson was impressed by the intelligent and ambitious structure of learning that Milton laid out in “Of Education,” but, as he explains in his Life of Milton, he thought the scheme gave too much attention to what Milton would have called “natural philosophy” and what we call “science.”

But the truth is that the knowledge of external nature, and the sciences which that knowledge requires or includes, are not the great or the frequent business of the human mind. Whether we provide for action or conversation, whether we wish to be useful or pleasing, the first requisite is the religious and moral knowledge of right and wrong; the next is an acquaintance with the history of mankind, and with those examples which may be said to embody truth and prove by events the reasonableness of opinions. Prudence and Justice are virtues and excellences of all times and of all places; we are perpetually moralists, but we are geometricians only by chance.