When it comes to doctrine (any doctrine) where you begin determines where you end. If you begin with God’s wrath then you end up with wrath being satisfied. If you begin with death then you end up with death being overcome. If you begin with social injustice you will end with a just reign. If you begin with covenant community you will end with the Kingdom of God. This is the point I’ve been focusing on recently. Where you begin in your doctrine – what you presuppose – determines where you end in your doctrine.
In his book, Mere Christianity, C.S. Lewis speaks of the theories of Atonement and notes that the theories themselves are not the thing we are asked (by God) to accept. “Many of you no doubt have read Jeans or Eddington. What they do when they want to explain the atom, or something of that sort, is to give you a description out of which you can make a mental picture. But then they warn you that this picture is not what the scientists actually believe. What the scientists believe is a mathematical formula. The pictures are there only to help you to understand the formula.” In this way, theories of Atonement are like a metaphor.
Take Penal Substitution Theory, for example. It is based on biblical penal substitution which addresses the moral implications of sin. While most occasions Scripture approaches the atonement from a different angle, it is fairly clear that in Romans Paul addresses penal aspects of sin. Biblical penal substitution presents Christ experiencing the wages of sin and sharing in our “infirmities”. The Penal Substitution Theory contextualizes the Atonement within a worldly judicial framework where sin becomes a “debt” to be reconciled through punishment. The problem, of course, is that God does not punish sin because sin cannot be punished. You can punish a disobedient child, but you can not actually punish the disobedience. If you could, nothing would be remedied. And even sin could be punished, the moral aspect of sin is only one part of the larger definition. But this does not mean the Theory itself is valueless as it communicates, through a mental picture, one aspect of the atoning work of Christ.