I tried and didn't make the cut
Sin A is envy. I was jealous of the times I read about writers boasting of sales, money and best sellers - all I wanted was a small crumb off the table.
Sin B is arrogance. I was arrogant enough to think people would buy my work, outside the early success of my sci-fi series, nothing has sold.
Sin C is sloth. The sloth has been brought on by the lack of interest in the books on sale, I now no longer care if I go weeks/ months without writing, soon I won't be blogging either. My life is so dull there is nothing to write about anyway.