"For what will it profit a man if he gains the whole world, and loses his own soul? Or what will a man give in exchange for his soul?" - Mark 8:36-37
What does this mean? It is easy to allow ourselves to misinterpret this passage. When we see such lofty statements, we most often think of the passage as dealing with only huge deviations from the true path. And Jesus does indeed speak of great things (ie. gaining the whole world). yet, this does not mean that "the small stuff" is not implied here. Indeed, the point is not to say that we are "ok" unless we make a "small" error. The point of the whole passage is that we should by totally and wholly devoted to God: his life should be ours, and our life should be his. Rarely is a man offered the whole world for his soul. However, sometimes a man is offered something much smaller, and forfeits his soul for it. What profit is it if a man gains an attractive young mistress, but loses his soul? What profit is it if a women gains that new promotion at work, but in the process loses her soul? The devil tempted Jesus with the whole world, but we should not think that we, too, would be tempted with such things.
Why would Satan tempt us with the world, when we are ready to turn our backs on the most important things for next to nothing? Did not Esau sell his birthright for a mere bowl of soup? (Gen. 25:29-34) Did not Ananias and Sapphira lose their lives because of an amount of money that was insignificant compared to the spiritual treasure they must have been experiencing? (Acts 5:1-11) Did not Judas betray Christ our God for thirty pieces of silver, the price of a slave? (Matt. 26:14-16, 47-49) We should not think that we are too much better, when we daily hand our soul over to our Father Satan by our sinful disobedience to God. How hard salvation is to find.