“If you would convince a man that he does wrong, do right. But do not care to convince him. Men will believe what they see. Let them see.”
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Henry David Thoreau 385
1817-1862 American poet, essayist, naturalist, and abolitio… 1817–1862Related quotes

The last sentence is from the 16 October 1854 Peoria speech, slightly paraphrased. No known contemporary source for the rest. It first appears, attributed to Lincoln, in US religious/inspirational journals in 1907-8, such as p123, Friends Intelligencer: a religious and family journal, Volume 65, Issue 8 (1908)
Misattributed

“I believe him, and I'm convinced that he is.”
Ich glaube ihm das, und ich bin davon überzeugt, dass er das ist.
responding to the question Ist Putin ein lupenreiner Demokrat? (Is Putin an exemplary democrat?), interview on the TV show ‘Beckmann’, 23 November 2004, quoted on dradio.de http://www.dradio.de/dlf/sendungen/interview_dlf/1015218/

Press conference in Switzerland on 2 June 1984, as cited by Andrew Donaldson, Sunday Times, 5 November 2006

Source: The Tales of Alvin Maker, Seventh Son (1987), Chapter 10.

"Who's afraid of People Power", Philippine Graphic, 31 January 2005, p. 28, ISSN 119-206X.
2005