It is Hugo von Hofmannsthal, and these are from The Book of Friends:
Minor intellects - the so-called brilliant ones - stir up, but do not dominate, the ideas of their time.
The famous author lives merely in a different form of obscurity from the author of whom no one speaks.
Good taste is the ability continuously to counteract exaggeration.
The worst style develops when a man imitates something while pretending to feel superior to the object of his imitation.
-- translated by J.D. McClatchy, The Whole Difference