To live for anything else but God leads to breakdown and decay. When a fish leaves the water, which he was built for, he is not free, but dead. Worshiping other things besides God leads to a loss of meaning. If we achieve these things, they cannot deliver satisfaction, because they were never meant to be ‘gods.’ They were never meant to replace God. Worshiping other things besides God also leads to self- image problems. We end up defining ourselves in terms of our achievement in these things. We must have them or all is lost; so they drive us to work too hard, or they fill us with terror if they are jeopardized.
– Tim Keller