“Never underestimate the value of a falsehood, friends. Never doubt the power of a lie. Blessed are the mendacious, for they shall grow wealthy beyond their wildest dreams.”
Source: Blameless in Abaddon (1996), Chapter 2 (p. 42; spoken by the Devil)
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James K. Morrow 166
(1947-) science fiction author 1947Related quotes

“Never underestimate the power of human ingratitude.”
Source: Shadow Games (1989), Chapter 30, “Taglios Aroused” (p. 156)

“Never underestimate the power of the mind to disempower.”
Step 5, p. 112
The Heart of Change, (2002)

“Never underestimate the power of a good story.”
Step 3, p. 80
The Heart of Change, (2002)
“Never underestimate the persuasive power of somehow.”
2010s
Context: Although no credible evidence exists that the speed of light can be exceeded, writers are willing to embrace the possibility that light might be outpaced somehow. Never underestimate the persuasive power of somehow.

Quotes, 29 November 2013, The Sunday Indian http://www.thesundayindian.com/en/quote-of-the-day/,

“Never underestimate your power to change yourself; never overestimate your power to change others.”

“Never underestimate the power of funny, it moves mountains.”
Source: Fang