To quote the author, "...Hold your work to the highest of high standards. A competent book will never be taken on by an agent. A good book is unlikely to be taken on. A dazzling book WILL be taken on . . . and could well go on to sell for a lot of money.
Most writers don’t want to hear that advice, but truthfully? It’s the only advice that really, really matters. You can’t ignore it."
This is the front for a business but the advice is good nonetheless.