Source: Rising Stars of Cinematography (2019)
“It’s good to test yourself and develop your talents and ambitions as fully as you can and achieve greater success; but I think success is the feeling you get from a job well done, and the key thing is to do the work.”
Forbes: "Peter Thiel: 'Don't Wait to Start Something New'" https://www.forbes.com/sites/carolinehoward/2014/09/10/peter-thiel-dont-wait-to-start-something-new/#3c8e20f71e69 (10 September 2014)
Help us to complete the source, original and additional information
Peter Thiel 11
American entrepreneur, venture capitalist, and hedge fund m… 1967Related quotes

Q&A with Downton Abbey creator Julian Fellowes https://britishheritage.com/interviews/downton-abbey-julian-fellowes (July 22, 2021)

Variant: Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.

Letter 1
Letters on Logic: Especially Democratic-Proletarian Logic (1906)
Source: https://www.google.com/books/edition/What_Is_E_Commerce/PkPhDwAAQBAJ
Source: Success! (1977), p. 145
Context: Your chances of success are directly proportional to the degree of pleasure you derive from what you do. If you are in a job you hate, face the fact squarely and get out. You may earn a good living, you may have a safe career, but you will never be a success. Find out what you enjoy doing, and your chances of succeeding will be dramatically better. We play the game every day, sometimes without even recognizing that we're doing it. We compete with other people, or other teams, or other companies, not only because it is essential to business survival, but because we frankly enjoy competition. It's fun to be in the game, and it's even more fun to win.

http://books.google.com/books?id=FucDAAAAMBAJ&pg=PT25&lpg=PT25&dq=The+key+issue+is+jobs.+You+can't+get+away+from+it:+jobs.+Having+a+buck+or+two+in+your+pocket+and+feeling+like+somebody&source=bl&ots=TYKi7WaW5v&sig=-4ggLp9hfdxXUvrZIF8U1OpGMSU&hl=en&ei=0CPkS4LSJ4P68Aakk7SpBA&sa=X&oi=book_result&ct=result&resnum=1&ved=0CAcQ6AEwAA Mother Jones Magazine - Sep 1995
The Guardian interview (2002)