“This world is empty to him alone who does not understand how to direct his libido towards objects, and to render them alive and beautiful for himself, for Beauty does not indeed lie in things, but in the feeling that we give to them.”

Source: Nietzsche et la métaphore (1972), p. 29

Source: Drenai series, Quest for Lost Heroes, Ch. 10

"Talk to an Art-Union (A Brooklyn fragment)" http://www.aol.bartleby.com/229/4011.html (1839); later delivered as a lecture at the Brooklyn Art Union (31 March 1851) and printed in the Brooklyn Daily Advertizer (3 April 1851)
Context: It is a beautiful truth that all men contain something of the artist in them. And perhaps it is the case that the greatest artists live and die, the world and themselves alike ignorant what they possess. Who would not mourn that an ample palace, of surpassingly graceful architecture, fill’d with luxuries, and embellish’d with fine pictures and sculpture, should stand cold and still and vacant, and never be known or enjoy’d by its owner? Would such a fact as this cause your sadness? Then be sad. For there is a palace, to which the courts of the most sumptuous kings are but a frivolous patch, and, though it is always waiting for them, not one of its owners ever enters there with any genuine sense of its grandeur and glory.
I think of few heroic actions, which cannot be traced to the artistical impulse. He who does great deeds, does them from his innate sensitiveness to moral beauty.

7 September 1854 (p. 252)
1831 - 1863, Delacroix' 'Journal' (1847 – 1863)

"1901", p. 76. Sometimes misquoted as "If fifty million people say a foolish thing, it is still a foolish thing". Sometimes misattributed to Bertrand Russell or Anatole France
A Writer's Notebook (1946)

W. Somerset Maugham, A Writer's Notebook (1949), entry for 1901
Sometimes misquoted as "If fifty million people say a foolish thing, it is still a foolish thing."
Sometimes misattributed to Anatole France
Note that Russell does say something similar in Marriage and Morals (1929): "The fact that an opinion has been widely held is no evidence whatever that it is not utterly absurd; indeed in view of the silliness of the majority of mankind, a widespread belief is more likely to be foolish than sensible."
Misattributed

Illi mors gravis incubat
Qui notus nimis omnibus
Ignotus moritur sibi
Thyestes, lines 401-403; (Chorus).
Alternate translation: Death weighs on him who is known to all, but dies unknown to himself. (The Philisophical Life by James Miller).
Tragedies

Source: First They Killed My Father: A Daughter of Cambodia Remembers

[Who's Who in Contemporary Gay & Lesbian History: From World War II to the Present Day, ISBN 041522974X, 2001, Aldrich, Robert and Wotherspoon, Gary (eds)]