Most would-be writers fail because they're not willing to do the work and learn. They have a computer with a spell checker, and what more do they need? Everything they write should be bought and published. Almost anybody who's willing to write a lot, to try to write well, and to market what he writes succeeds.
Most of writing is easy. Characterization and plotting, which seem to scare a lot of beginners to death, are easily learned and soon become almost automatic. The hard things are telling a good story and writing graceful grammatical prose.
(From An Interview With Gene Wolfe)
'How could the Outsider have chosen such a bungler? ...When had he ever offered a single sacrifice, however small, to the Outsider? Never! Not one in his entire life. Yet the Outsider had extended infinite credit to him... Certainly he would never be able to repay the Outsider for the knowledge and the honor, no matter how hard or how long he tried.' (Gene Wolfe, Nightside The Long Sun)