“I have a picture in my mind of the majesty of Christ like the sun at the center of the solar system of your life.  The massive sun, 333,000 times the mass of the earth, holds all the planets in orbit, even little Pluto, 3.6 billion miles away.  So it is with the supremacy of Christ in your life. All the planets of your life—your sexuality and desires, your commitments and beliefs, your aspirations and dreams, your attitudes and convictions, your habits and disciplines, your solitude and relationships, your labor and leisure, your thinking and feeling—all the planets of your life are held in orbit by the greatness and gravity and blazing brightness of the supremacy of Jesus Christ at the center of your life.  If he ceases to be the bright, blazing, satisfying beauty at the center of your life, the planets will fly into confusion, a hundred things will be out of control, and sooner or later they will crash into destruction.”

-John Piper, from Sex and the Supremacy of Christ, 37-38.

While we’re on the sun metaphor, here’s another quote from the quotable C. S. Lewis:

“I believe in Christianity as I believe that the sun has risen, not only because I see it, but because by it I see everything else.”