WHEN YOU ARE YOUNG, YOU CAN always fall back on yourself for company, unless you are a very melancholy kind of person. When you go to bed at night, and can't get to sleep yet, you can be quite happy thinking about your own plans and your own pleasures, your own friends and your own ambitions; you can lie there day-dreaming, and tell yourself stories about what you are going to do when you grow up ... But when you've had fifty years and more of your own company, it ceases to be quite so enjoyable - you've got bored with it. And that breeds a dreadful loneliness inside the human soul, unless the human soul has learned, and has managed to remember, and still believes, that God exists. You have begun to see yourself as a pretty second-rate sort of article; your prospects of getting your way over this and that don't seem so frightfully important; your judgment of things and of people doesn't seem to matter so much; what the map of Europe will be like in a hundred years' time is a speculation that doesn't much interest you.
THEN, to believe that God exists means that you have something - better still, that you have somebody - to fall back upon; everything still matters, because there is God's will to be taken into account, God's glory to be considered. "I BELIEVE IN GOD"; forty years from now, if you keep then the faith you have now, you will be thanking God that God exists.
- Ronald A. Knox