"Religion: A Dialogue."
Variant translation: To free a man from error does not mean to take something from him, but to give him something. 
Essays 
Source: Essays and Aphorisms 
Context: To free a man from error is to give, not to take away. Knowledge that a thing is false is a truth. Error always does harm; sooner or later it will bring mischief to the man who harbors it. Then give up deceiving people; confess ignorance of what you don't know, and leave everyone to form his own articles of faith for himself. Perhaps they won't turn out so bad, especially as they'll rub one another's corners down, and mutually rectify mistakes. The existence of many views will at any rate lay a foundation of tolerance. Those who possess knowledge and capacity may betake themselves to the study of philosophy, or even in their own persons carry the history of philosophy a step further.
                                    
“Sooner or later, false thinking brings wrong conduct.”
"Religion and Science: Old Wine in New Bottles" in the Traveller's Library (1933) edited by William Somerset Maugham. p. 1248
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Julian Huxley 38
English biologist, philosopher, author 1887–1975Related quotes
“Sooner or later, those who win are those who think they can.”
“This teaching is to live as we think, otherwise, sooner or later, we end up thinking as we lived.”
                                        
                                        Cet enseignement, c'est qu'il faut vivre comme on pense, sinon, tôt ou tard, on finit par penser comme on a vécu. 
Epilogue 
The Demon of Noonday (1914)
                                    
Source: James Nasmyth engineer, 1883, p. 218 (p. 181 in 2010 edition)
Source: An Essay on Aristocratic Radicalism (1889), p. 11
                                        
                                        Source: Lateral Thinking : Creativity Step by Step (1970), p. 5; Preface. 
Context: Lateral thinking... is the process of using information to bring about creativity and insight restructuring. Lateral thinking can be learned, practised and used. It is possible to acquire skill in it just as it is possible to acquire skill in mathematics.
                                    
As quoted in Words of Wisdom : More Good Advice (1990) by William Safire and Leonard Safire, p. 185
Source: Lateral Thinking : Creativity Step by Step (1970), p. 5; Preface
                                        
                                        Remark (November 1914), Paul Dehn, Hindenburg, als Erzieher (1918), p. 12, quoted in W. W. Coole (ed.), Thus Spake Germany (London: George Routledge & Sons, 1941), p. 74 
Supreme Commander of All German Forces in the East