An idol is something that you have devoted your life to. It might be a way of life that involves self-sacrifice, self-discipline, or self-obsession. It might involve devotion to family, applause, comfort, power, more stuff, less stuff, more friends, more likes, more followers, even more church. The bottom line is that idolatry happens when you obsess. When there is something in your life that you are consumed with, that you can’t live without, or that you would do anything to keep—if you love something with all of your heart—then you have an idol. We can say that because of what Jesus said in Matthew 22:37: “Love the Lord your God with all your heart and with all your soul and with all your mind” (Matt. 22:37). That means you were made to obsess, to give 100 percent of your everything to Him. So when you obsess over anything other than God, you make that thing your little God, your idol, and God is replaced.
excerpted from Own It, Leaving Behind a Borrowed Faith