As quoted in Making a Habit of Success: How to Make a Habit of Succeeding, How to Win With High Self-Esteem (1999) by MacK R. Douglas, p. 45. Unsourced variant: What this power is, I cannot say. All I know is that it exists... and it becomes available only when you are in that state of mind in which you know exactly what you want...and are fully determined not to quit until you get it. 
Context: I had made up my mind to find that for which I was searching even if it required the remainder of my life. After innumerable failures I finally uncovered the principle for which I was searching, and I was astounded at its simplicity. I was still more astounded to discover the principle I had revealed not only beneficial in the construction of a mechanical hearing aid but it served as well as means of sending the sound of the voice over a wire. Another discovery which came out of my investigation was the fact that when a man gives his order to produce a definite result and stands by that order it seems to have the effect of giving him what might be termed a second sight which enables him to see right through ordinary problems. What this power is I cannot say; all I know is that it exists and it becomes available only when a man is in that state of mind in which he knows exactly what he wants and is fully determined not to quit until he finds it.
                                    
“Life at Papeete soon became a burden.It was Europe, the Europe which I had thought to shake off — and that under the aggravating circumstances of colonial snobbism, and the imitation, grotesque even to the point of caricature, of our customs, fashions, vices, and absurdities of civilization.Was I to have made this far journey, only to find the very thing which I had fled?”
            Quote from Noa Noa ,(1893) [Dover, 1985, ISBN 0-486-24859-3], p. 2. 
1890s - 1910s
        
Help us to complete the source, original and additional information
Paul Gauguin 41
French Post-Impressionist artist 1848–1903Related quotes
Source: The Eleventh Commandment (1962), Chapter 2 (p. 14)
                                        
                                         Chapter 2, section 2: The Self as Nought (II) http://books.google.com/books?id=tWZQPAoh3ZQC&q=%22There+is+no+fashion+so+absurd+even+grotesque+that+it+cannot+be+adopted+given+two+things+the+authority+of+the+fashion+setter+Dior+Jackie+Onassis+and+the+vacuity+or+noughtness+of+the+consumer%22&pg=PA23#v=onepage. 
Lost in the Cosmos: The Last Self-Help Book (1983)
                                    
                                        
                                        Prime Minister 
Source:  Speech http://hansard.millbanksystems.com/commons/1919/jul/03/territorial-adjustments#column_1215 in the House of Commons on the Treaty of Versailles (3 July 1919)
                                    
Torture and Resistance in Iran, 1971
                                
                                    “Jubal had a frame
Fashioned to finer senses, which became
A yearning for some hidden soul of things”
                                
                                
                                
                                
                            
                                        
                                        The Legend of Jubal (1869) 
Context: Jubal had a frame
Fashioned to finer senses, which became
A yearning for some hidden soul of things,
Some outward touch complete on inner springs
That vaguely moving bred a lonely pain,
A want that did but stronger grow with gain
Of all good else, as spirits might be sad
For lack of speech to tell us they are glad.
                                    
                                        
                                        My Thoughts 
The Note-Books of Samuel Butler (1912), Part XIV - Higgledy-Piggledy
                                    
                                        
                                         Speech http://hansard.millbanksystems.com/commons/1990/nov/07/first-day in the House of Commons (7 November 1990). 
1990s
                                    
                                        
                                        After UK Foreign Secretary Douglas Hurd claimed lifting the arms embargo to Bosnians would create a "level killing field", as reported in 'Thatcher says massacre brings shame on west' by Philip Webster and Robert Morgan in The Times (14 April 1993) 
Post-Prime Ministerial