What is an idol? It is anything more important to you than God, anything that absorbs your heart and imagination more than God, anything you seek to give you what only God can give.
Timothy KellerThose who believe they have pleased God by the quality of their devotion and moral goodness naturally feel that they and their group deserve deference and power over others. The God of Jesus and the prophets, however, saves completely by grace. He cannot be manipulated by religious and moral performance--he can only be reached through repentance, through the giving up of power. If we are saved by sheer grace we can only become grateful, willing servants of God and of everyone around us.
Timothy Keller