The idea of a classic implies something that has continuance and consistence, and which produces unity and tradition, fashions and transmits itself, and endures…. A true classic, as I should like to hear it defined, is an author who has enriched the human mind, increased its treasure, and caused it to advance a step; who has discovered some moral and not equivocal truth, or revealed some eternal passion in that heart where all seemed known and discovered; who has expressed his thought, observation, or invention, in no matter what form, only provided it be broad and great, refined and sensible, sane and beautiful in itself; who has spoken to all in his own peculiar style, a style which is found to be also that of the whole world, a style new without neologism, new and old, easily contemporary with all time.
(Charles Augustin Sainte-Beuve 1850 zu der Frage, was er unter einem Klassiker versteht, aus: Literary and Philosophical Essays. 1909-14, Vol. 32. The Harvard Classics)