It had never really progressed, it had simply fallen apart into a series of fragments. And out of two years’ work that was all that he had to show — just fragments, incomplete in themselves and impossible to join together. On every one of those sheets of paper there was some hacked scrap of verse which had been written and rewritten and rewritten over intervals of months. There were not five hundred lines that you could say were definitely finished. And he had lost the power to add to it any longer; he could only tinker with this passage or that, groping now here, now there, in its confusion. It was no longer a thing that he created, it was merely a nightmare with which he struggled. For the rest, in two whole years he had produced nothing except a handful of short poems — perhaps a score in all. It was so rarely that he could attain the peace of mind in which poetry, or prose for that matter, has got to be written. The times when he ‘could not’ work grew commoner and commoner. Of all types of human being, only the artist takes it upon him to say that he ‘cannot’ work.
Gordon’s agony, in George Orwell’s Keep the Aspidistra Flying, 1936
(HT @poetrypotion for the reminder)