To the extent that we are trapped by the overvaluing, idealizing tendency, we are not free fully to celebrate the limited but real goods of creation. Idolatry by definition is not an accurate assessment of creaturely goods, but an overvaluing of them so as to miss the richness of their actual, limited values. If I worship my tennis trophies, my Mondrian, my family tree, my Kawasaki, or my bank account, then I do not really receive those goods for what they actually are - limited, historical, and finite - goods which are vulnerable to being taken away by time and death. When I pretend that a value is something more than it is, ironically I value it less appropriately than it deserves. Biblical psychology invites us to relate ourselves absolutely to the absolute and relatively to the relative.
When human beings give their heartfelt allegiance to and worship that which is not God, they progressively cease to reflect the image of God. One of the primary laws of human life is that you become like what you worship; what’s more, you reflect what you worship not only to the object itself but also outward to the world around. Those who worship money increasingly define themselves in terms of it and increasingly treat other people as creditors, debtors, partners, or customers rather than as human beings. Those who worship sex define themselves in terms of it (their preferences, their practices, their past histories) and increasingly treat other people as actual or potential sex objects. Those who worship power define themselves in terms of it and treat other people as either collaborators, competitors, or pawns. These and many other forms of idolatry combine in a thousand ways, all of them damaging to the image-bearing quality of the people concerned and of those whose lives they touch.
We are drawn towards a thing, either because there is some good we are seeking from it, or because we cannot do without it. Sometimes the two motives coincide. Often however they do not. Each is distinct and quite independent. We eat distasteful food, if we have nothing else, because we cannot do otherwise. A moderately greedy man looks out for delicacies, but he can easily do without them. If we have no air we are suffocated, we struggle to get it, not because we expect to get some advantage from it but because we need it. We go in search of sea air without being driven by any necessity, because we like it. In time it often comes about automatically that the second motive takes the place of the first. This is one of the great misfortunes of our race. A man spokes opium in order to attain to a special condition, which he thinks superior; often, as time goes on, the opium reduces him to a miserable condition which he feels to be degrading; but he is no longer able to do without it.