Plato, too, like every great man, consumed his own times. What is a great man but one of great affinities, who takes up into himself all arts, sciences, all knowables, as his food? He can spare nothing; he can dispose of everything. What is not good for virtue, is good for knowledge. Hence his contemporaries tax him with plagiarism. But the inventor only knows how to borrow; and society is glad to forget the innumerable laborers who ministered to this architect, and reserves all its gratitude for him. When we are praising Plato, it seems we are praising quotations from Solon and Sophron and Philolaus. Be it so. Every book is a quotation; and every house is a quotation out of all forests and mines and stone quarries; and every man is a quotation from all his ancestors. And this grasping inventor puts all nations under contribution.
Emerson, “Plato: or, the Philosopher”