Go Rin No Sho (1645), The Ground Book 
Context: To master the virtue of the long sword is to govern the world and oneself, thus the long sword is the basis of strategy. The principle is "strategy by means of the long sword". If he attains the virtue of the long sword, one man can beat ten men. Just as one man can beat ten, so a hundred men can beat a thousand, and a thousand men can beat ten thousand. In my strategy, one man is the same as ten thousand, so this strategy is the complete warrior's craft.
The Way of the warrior does not include other Ways, such as Confucianism, Buddhism, certain traditions, artistic accomplishments and dancing. But even though these are not part of the Way, if you know the Way broadly you will see it in everything. Men must polish their particular Way.
                                    
“You can sway a thousand men by appealing to their prejudices quicker than you can convince one man by logic.”
            “If This Goes On—” Chapter 10, p. 426 
The Past Through Tomorrow (1967) 
Source: Revolt in 2100/Methuselah's Children 
Context: “Do you seriously expect to start a rebellion with picayune stuff like that?”
“It’s not picayune stuff, because it acts directly on their emotions, below the logical level. You can sway a thousand men by appealing to their prejudices quicker than you can convince one man by logic. It doesn’t have to be a prejudice about an important matter either.
        
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Robert A. Heinlein 557
American science fiction author 1907–1988Related quotes
“If you use a trick in logic, whom can you be tricking other than yourself?”
Source: Culture and Value (1980), p. 24e
Source: The devil in the hills (1949), Chapter 5, p. 306
“Inexperience can be overcome, ignorance can be enlightened, but prejudice will destroy you.”
Source: The Black Gryphon
Source: The Chronicles of Prydain (1964–1968), Book III: The Castle of Llyr (1966), Chapter 19
A Week on the Concord and Merrimack Rivers http://www.gutenberg.org/dirs/etext03/7cncd10.txt (1849), Sunday
                                        
                                        As quoted in  "What a Real President Was Like: To Lyndon Johnson, the Great Society Meant Hope and Dignity" http://pqasb.pqarchiver.com/washingtonpost/doc/307079109.html?FMT=ABS&FMTS=ABS:FT&date=Nov+13%2C+1988&author=Moyers%2C+Bill+D&desc=What+a+Real+President+Was+Like%3B+To+Lyndon+Johnson%2C+the+Great+Society+Meant+Hope+and+Dignity, by Bill Moyers, The Washington Post (13 November 1988). 
Attributed
                                    
“You can get a thousand no's from people, and only one "yes" from God.”
Variant: You can get a thousand no's from people, and only one «yes» from God.