Peter De Vries (February 27, 1910 – September 28, 1993) was an American editor and novelist known for his satiric wit. He has been described by the philosopher Daniel Dennett as "probably the funniest writer on religion ever".
You may find more from Peter De Vries on Wikiquote
You are going to have to give and give and give, or there’s no reason for you to be writing. You have to give from the deepest part of yourself, and you are going to have to go on giving, and the giving is going to have to be its own reward. There is no cosmic importance to your getting something published, but there is in learning to be a giver.