“We can ignore reality, but we cannot ignore the consequences of ignoring reality.”
Variant: We can evade reality, but we cannot evade the consequences of evading reality
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Ayn Rand 322
Russian-American novelist and philosopher 1905–1982Related quotes

“How can the reality of 600 million Chinese be ignored?”
About withdrawing diplomatic recognition of Taiwan in favor of the People's Republic of China
"One Man's Cup of Coffee," Time Magazine profile (June 30, 1961)

Source: Atma Bodha (1987), p. 82: Quote nr. 44.

"Without a Trace" (review of The Sixth Extinction by Elizabeth Kolbert), New York Times Sunday Book Review, 10 February 2014, page BR1 http://www.nytimes.com/2014/02/16/books/review/the-sixth-extinction-by-elizabeth-kolbert.html?_r=0
“We cannot overcome obstacles with ignorance.”
Source: Full House (1996), Chapter 4, “Case One: A Personal Story” (p. 46)

The best obtainable version of the truth http://www.riasberlin.de/rcom-pubs/rcus-pubs-news4-98.html, Carl Bernstein's talk at the annual convention of the Radio and Television News Directors Association, 1998-09-26.
Guardian Camwar, in Ch. 4 : the cooper<!-- p. 42 -->
Source: The Visitor (2002)
Context: You asked for wisdom? Hear these words. Nothing limits intelligence more than ignorance; nothing fosters ignorance more than one's own opinions; nothing strengthens opinions more than refusing to look at reality.
Address to the Pan Pacific HIV/AIDS Conference, Auckland, New Zealand, October 2005

“Action cannot destroy ignorance, for it is not in conflict with or opposed to ignorance.”
Source: Atma Bodha (1987), p. 6: Quote nr. 3.
Context: Action cannot destroy ignorance, for it is not in conflict with or opposed to ignorance. Knowledge does verily destroy ignorance as light destroys deep darkness.