“It's easy, after all, not to be a writer. Most people aren't writers, and very little harm comes to them.”

Source: Speedboat

Source: Factotum (1975), Ch. 73
Context: There were always men looking for jobs in America. There were always all these usable bodies. And I wanted to be a writer. Almost everybody was a writer. Not everybody thought they could be a dentist or an automobile mechanic but everybody knew they could be a writer. Of those fifty guys in the room, probably fifteen of them thought they were writers. Almost everybody used words and could write them down, i. e., almost everybody could be a writer. But most men, fortunately, aren't writers, or even cab drivers, and some men - many men - unfortunately aren't anything.

The Paris Review interview
Context: Many writers write a great deal, but very few write more than a very little of the real thing. So most writing must be displaced activity. When cockerels confront each other and daren’t fight, they busily start pecking imaginary grains off to the side. That’s displaced activity. Much of what we do at any level is a bit like that, I fancy. But hard to know which is which. On the other hand, the machinery has to be kept running. The big problem for those who write verse is keeping the machine running without simply exercising evasion of the real confrontation. If Ulanova, the ballerina, missed one day of practice, she couldn’t get back to peak fitness without a week of hard work. Dickens said the same about his writing—if he missed a day he needed a week of hard slog to get back into the flow.

Paris Review interview (1958)

As quoted in The New York Times (2 July 1978)

Miloš Urošević, as quoted in May '92 (2012) p.19
About

On his wanting to become a writer at an early age in " From Poverty to Power: The Inspiring Story of Tomas Rivera http://www.teenink.com/nonfiction/academic/article/778847/From-Poverty-to-Power-The-Inspiring-Story-of-Tomas-Rivera" (TeenInk)