In the like manner, when I used to explain to him our several systems of natural philosophy, he would laugh, “that a creature pretending to reason, should value itself upon the knowledge of other people’s conjectures, and in things where that knowledge, if it were certain, could be of no use.” Wherein he agreed entirely with the sentiments of Socrates, as Plato delivers them; which I mention as the highest honour I can do that prince of philosophers. I have often since reflected, what destruction such doctrine would make in the libraries of Europe; and how many paths of fame would be then shut up in the learned world.