If there is no profit, there is no satisfaction, for man needs to gain something in order for life to be worthwhile, otherwise all his labour is pointless. Human nature has within it an unquenchable desire to make real gain, but such purposes as man is occupied with in this life mock him by drawing him first one way and then another until he despairs of life itself. But for those who know God, life is transformed. Although they are still subject to the law of vanity which universally affect our world, they see another law at work by which God allows none of their labours to fall to the ground. What is done out of service to man is done out of service to Christ, and he forgets nothing but rewards all who serve him. This provides a new motive for diligence which is unknown to an unbelieving world. No wonder it is those nations where the gospel has flourished that prosperity has also flourished, for the gospel provides a motivation for industriousness that a worldview of chance will never provide. For the unbeliever the hourglass of life is running out. His attempts to add significance to his life is like someone who draws pictures in the sand before the incoming tide.