Original: In qualsiasi professione, la differenza la fa sempre l'amore che si prova per un lavoro. Amare il proprio lavoro... è l'unico modo per fare bene il proprio dovere. 
Source: prevale.net
                                    
“In any profession, there are always ups and downs.”
There will always be twists and turns in our lives. http://www.storypick.com/quotes-by-tendulkar/
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Sachin Tendulkar 13
A former Indian cricketer from India and one of the greates… 1973Related quotes
“The profession of arms is always the most honourable.”
                                        
                                        ‘Boxing’, Political Register (10 August 1805), p. 199 
1800s
                                    
Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 200.
                                        
                                        "On Cant and Hypocrisy" 
Men and Manners: Sketches and Essays (1852)
                                    
“Life is not always perfect. Like a road, it has many bends, ups and down, but that’s its beauty.”
World Peace: The Voice of a Mountain Bird (2014) https://books.google.co.uk/books?id=KkYtBgAAQBAJ,
“Do you know what I was smiling at? You wrote down that you were a writer by profession.”
                                        
                                        It sounded to me like the loveliest euphemism I had ever heard. When was writing ever your profession? It's never been anything but your religion. 
Raise High the Roof Beam, Carpenters and Seymour: An Introduction (1963), Seymour: An Introduction (1959)
                                    
                                        
                                        Quotes, 1960 - 1970 
Source:  LIFE http://books.google.com/books?id=XUoEAAAAMBAJ&pg=PA49, Vol. 64, nr. 3, 19 January 1968, p. 49