Because if you're trying to write and you have unlimited time, you can procrastinate an unlimited account, but if you have limited time, you rush to the page trying to get something down in the little bit of fragment of time that you have, and you may write a great deal that way.
“I think there are a number of bishops - and I put Cardinal Mahony in that category - who listen too much to his lawyer and not enough to his heart.”
“I am a freeman, an American, a United States Senator, and a Democrat, in that order.”