“I question not my corporeal eye”
A Vision of the Last Judgment
Context: I assert, for myself, that I do not behold the outward creation, and that to me it is hindrance and not action. "What!" it will be questioned, "when the sun rises, do you not see a round disc of fire somewhat like a guinea!" Oh! no, no! I see an innumerable company of the heavenly host crying "Holy, holy, holy is the Lord God Almighty!" I question not my corporeal eye any more than I would question a window concerning a sight. I look through it, and not with it.
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William Blake 249
English Romantic poet and artist 1757–1827Related quotes

“I will take my corporal oath on it.”
Source: Don Quixote de la Mancha (1605–1615), Part I, Book IV, Ch. 10.

An Essay on the Beautiful
Context: It is now time, leaving every object of sense far behind, to contemplate, by a certain ascent, a beauty of a much higher order; a beauty not visible to the corporeal eye, but alone manifest to the brighter eye of the soul, independent of all corporeal aid. However, since, without some previous perception of beauty it is impossible to express by words the beauties of sense, but we must remain in the state of the blind, so neither can we ever speak of the beauty of offices and sciences, and whatever is allied to these, if deprived of their intimate possession. Thus we shall never be able to tell of virtue's brightness, unless by looking inward we perceive the fair countenance of justice and temperance, and are convinced that neither the evening nor morning star are half so beautiful and bright. But it is requisite to perceive objects of this kind by that eye by which the soul beholds such real beauties. Besides it is necessary that whoever perceives this species of beauty, should be seized with much greater delight, and more vehement admiration, than any corporeal beauty can excite; as now embracing beauty real and substantial. Such affections, I say, ought to be excited about true beauty, as admiration and sweet astonishment; desire also and love and a pleasant trepidation. For all souls, as I may say, are affected in this manner about invisible objects, but those the most who have the strongest propensity to their love; as it likewise happens about corporeal beauty; for all equally perceive beautiful corporeal forms, yet all are not equally excited, but lovers in the greatest degree.

Interview "Milton Friedman Responds" in Chemtech (February 1974) p. 72.

Source: 2005 GDC Keynote https://www.youtube.com/watch?v=w9HUMt2rrOI

When he quit BBC due to differences with John Birt, the Director General of BBC.
Source: Peter Victor, " Tully quits BBC http://www.independent.co.uk/news/tully-quits-bbc-1412865.html," The Independent, 10 July 1994

This politically motivated misattribution was contained in a forged letter circulated during the 1880 presidential campaign. Reported in Paul F. Boller, John George, They Never Said It: A Book of Fake Quotes, Misquotes, and Misleading Attributions (1990), p. 31
Misattributed
A Glass Can Only Spill What It Contains.
Brother, Sister (2006)