Two quotes from William Sloane Coffin, author of Credo:
“Hope is a state of mind independent of the state of the world. If your heart’s full of hope, you can be persistent when you can’t be optimistic. You can keep the faith despite the evidence, knowing that only in so doing has the evidence any chance of changing. So while I’m not optimistic, I’m always very hopeful.”
“It is terribly important to realize that the leap of faith is not so much a leap of thought as of action. For while in many matters it is first we must see then we will act; in matters of faith it is first we must do then we will know, first we will be and then we will see. One must, in short, dare to act wholeheartedly without absolute certainty.”