In an article for the Gospel Coalition, pastor and author Tim Keller offers this potent definition of sin: "Sin isn't only doing bad things, it is more fundamentally making good things into ultimate things. Sin is building your life and meaning on anything, even a very good thing, more than on God. Whatever we build our life on will drive us and enslave us. Sin is primarily idolatry."

In his bestseller The Reason for God, Keller further develops this line of thought, showing the reader examples of the "particular kinds of brokenness and damage" caused by idolatry:

If you center your life and identity on your spouse or partner, you will be emotionally dependent, jealous, and controlling. The other person's problems will be overwhelming to you.

If you center your life and identity on your family and children, you will try to live your life through your children until they resent you or have no self of their own. At worst, you may abuse them when they displease you.

If you center your life and identity on your work and career, you will be a driven workaholic and a boring, shallow person. At worst you will lose family and friends and, if your career goes poorly, develop deep depression.

If you center your life and identity on money and possessions, you'll be eaten up by worry or jealousy about money. You'll be willing to do unethical things to maintain your lifestyle, which will eventually blow up your life.

If you center your life and identity on pleasure, gratification, and comfort, you will find yourself getting addicted to something. You will become chained to the "escape strategies" by which you avoid the hardness of life.

If you center your life and identity on relationships and approval, you will be constantly overly hurt by criticism and thus always losing friends. You will fear confronting others and therefore will be a useless friend.

If you center your life and identity on a "noble cause," you will divide the world into "good" and "bad" and demonize your opponents. Ironically, you will be controlled by your enemies. Without them, you have no purpose.

If you center your life and identity on religion and morality, you will, if you are living up to your moral standards, be proud, self-righteous, and cruel. If you don't live up to your moral standards, your guilt will be utterly devastating.