“Of course, we need not be surprised if artistic excellence goes unrecognized on account of being unknown; but there should be the greatest indignation when, as often, good judges are flattered by the charm of social entertainments into an approbation which is a mere a pretence.”
Introduction, Sec. 3
De architectura (The Ten Books On Architecture) (~ 15BC), Book III
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Vitruvius 203
Roman writer, architect and engineer -80–-15 BCRelated quotes

Letter by Mozart, as quoted in a journal entry (12 December 1856) The Journal of Eugene Delacroix as translated by Walter Pach (1937), p. 521. The quote is not found in any authentic letter by Mozart.

Justification By Faith Alone (1738)

1900s, The Strenuous Life: Essays and Addresses (1900), The Strenuous Life
Context: Let us, as we value our own self-respect, face the responsibilities with proper seriousness, courage, and high resolve. We must demand the highest order of integrity and ability in our public men who are to grapple with these new problems. We must hold to a rigid accountability those public servants who show unfaithfulness to the interests of the nation or inability to rise to the high level of the new demands upon our strength and our resources. Of course we must remember not to judge any public servant by any one act, and especially should we beware of attacking the men who are merely the occasions and not the causes of disaster.

Vol. 1, p. 26; "A Letter Concerning Enthusiasm".
Characteristicks of Men, Manners, Opinions, Times (1711)
Henri Poincaré, Critic of Crisis: Reflections on His Universe of Discourse (1954), Ch. 1. The Iconoclast

Gli artisti veramente superiori giudicano senza pregiudizi di scuole, di nazionalità, di tempo. Se gli artisti del Nord e del Sud hanno tendenze diverse, è bene siano diverse.
Letter to Hans von Bülow, April 14, 1892, cited from Franco Abbiati Giuseppe Verdi (Milano: Ricordi, 1959) vol. 4, p. 440; translation from Charles Osborne (ed. and trans.) Letters of Giuseppe Verdi (London: Victor Gollancz, 1971) p. 249.

Louise Bourgeois, Donald Burton Kuspit (1988). Bourgeois. p. 76: On the art world