I can remember when I was an undergraduate student, how enlightening it was to learn from William Temple that what the Bible means by sin is "self-centeredness." Let me tell you how Temple puts it in his great little book, Christianity in the Social Order. He says, "I am the center of the world I see. And where the horizon is depends on where I stand. Education may make my self-centeredness less disastrous by broadening my horizon of vision. It's like a man climbing a tower who sees further in terms of physical vision while remaining himself the center and the standard of reference. I am the center of the world I see." That's what the Bible means by sin. Luther talks about man curved in on himself. Malcolm Muggeridge talks about the dark little dungeon of my own ego. That is sin, a twist of self-centeredness that has us imprisoned. But God's order is that we love him with all our being, and then that we love our neighbor and put ourselves last. Sin is the reversal of the order.
John Stott