From:
The Handbook of Bible ApplicationProfessing to be wise, they became fools, and exchanged the glory of the incorruptible God for an image in the form of corruptible man and of birds and four-footed animals and crawling creatures. (Romans 1:22-23 , NAS)
Idolatry worships the creature rather than the Creator. How could intelligent people turn to idolatry? Idolatry begins when people reject what they know about God. Instead of looking to him as the Creator and sustainer of life, they see themselves as the center of the universe. They soon invent “gods” that are convenient projections of their own selfish plans and decrees. These gods may be wooden figures, but they may also be goals or things we pursue such as money, power, or comfort. They may even be misrepresentations of God himself—making God in our image, instead of the reverse. The common denominator is this—idolaters worship the things God made rather than God himself. Is there anything you feel you can’t live without? Is there any priority greater than God? Do you have a dream you would sacrifice everything to realize? Does God take first place? Do you worship God or idols of your own making?
Idolatry is part of an overall rejection of God. Paul clearly portrays the inevitable downward spiral into sin. First, people reject God; next, they make up their own ideas of what a god should be and do; then they fall into sin—sexual sin, greed, hatred, envy, murder, strife, deceit, malice, gossip. Finally, they grow to hate God and encourage others to do so. God does not cause this steady progression toward evil. Rather, when people reject him, he allows them to live as they choose. God gives them over or permits them to experience the natural consequences of their sin. Once caught in the downward spiral, no one can pull himself or herself out. Sinners must trust Christ alone to put them on the path of escape.