As quoted in "Meet Clare Fischer" http://cdassassin.wordpress.com/2010/10/28/1999-interview-at-allaboutjazz-com/
“That's my great ambition. To be sure! Every time I attack a canvas I feel convinced, I believe that something's going to come of it... But I immediately remember that I've always failed before. Then I taste blood... I never know where I am going or where I want to go with this damned profession. All the theories mess you up inside.”
Source: Quotes of Paul Cezanne, after 1900, Cézanne, - a Memoir with Conversations, (1897 - 1906), p. 206 in: 'What he told me – III. The Studio'
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Paul Cézanne 62
French painter 1839–1906Related quotes
Feels Like We Only Go Backwards, Lonerism (2012).

“I know what I want, and where to go.”
Quoted in Salazar: biographical study - page 339; of Franco Nogueira - Published by Atlantis Publishing, 1977

“I am still encouraged to go on. I wouldn't know where else to go.”
Paris Review interview (1969)
Context: When you consider that there are a thousand ways to express even the simplest idea, it is no wonder writers are under a great strain. Writers care greatly how a thing is said — it makes all the difference. So they are constantly faced with too many choices and must make too many decisions.
I am still encouraged to go on. I wouldn't know where else to go.