I happened upon this post kind of by accident, but I am glad I did. This is an interesting conversation and many of you are making good points, but I think there is a grave misunderstanding about what exactly Divine Command Theory is. It is a particular view of ethics that claims all laws are dependent upon God’s will. The question is posed like this: Does God command us to do actions because they are morally right, or are they morally right because God commands them? That right there is the essence of the debate over Divine Command Theory (DCT). Those who hold DCT think that certain actions are morally right because God commands them. But that is NOT, I repeat, NOT, the traditional Catholic position.
The most famous Christian exposition of this theory probably comes from William of Ockham who was trying to defend God’s absolute freedom. He saw a problem with God not being able to do something, therefore, he concluded, moral laws are dependent upon God’s will, and He could change them if He wanted to. For example, God has forbidden adultery, therefore it is morally wrong to commit it. He could, however, according to DCT, if He wanted to declare adultery good, and it would no longer be immoral to commit it (Ocham did not think God would, but he did not deny that He could). If God, according to Ockham, could not declare something good or evil by His will then He somehow would not be all-powerful. Moral laws, according to DCT have nothing to do with our nature, purpose, or happiness.
This, however, is a false understanding about God and His nature. And this is NOT what a VAST majority of Catholic ethicists, including St. Thomas Aquinas, have believed. DCT is more of a Protestant way of thinking (although I do not want to paint them all in that way) because Martin Luther was extremely influenced by William of Ockham.
What St. Thomas Aquinas and other Catholic ethicist have propounded is a Virtue Ethics, one that is teleological (based on the final end we are created for). They (and the Catholic Church in general, although I do not know if there are official pronouncements on this) would say that God commands us to do actions because they are morally right, but because He wills them to be that way. This might make someone ask, “Wait, is there some standard for right and wrong that God Himself must look ‘up’ to?” No, that is not the case. While it is true that God could not make adultery good by willing it (because He cannot will that, it would be a contradiction of His nature), it is not because He is somehow limited, nor is there some standard of morality that He defers to. The moral laws God has revealed to us flow from His very nature. God is pure goodness, and He made the world and its laws according to His nature.
Perhaps a discussion human nature will help clear this up. Ockham denied that there is a common human nature. That is an obvious mistake, but it did cause him to think that laws cannot be made in accordance with our nature to help us achieve our ultimate end (our “telos”). God created us in such a way that to do good will make us ultimately happy (bring us closer to him) and doing evil will always harm us. Like everything that is created we were made for a purpose, and we need to be run a certain way to be happy. Like a car is made to run on gas, we cannot “run” on anything else besides goodness (i.e., God). Put orange juice or wiper fluid or anything else (unless the car is made to run on something else, but that is a different kind of vehicle) in the car and it will not run, or it will run very poorly. Likewise, God made us to run a certain way (I doubt that He could have made us (creatures of intellect and will) to run on anything but Himself, but that is a different story).
So you can see why Ockham would deny that if he denied human nature. I hope this clears a few things up. I am writing this rather quickly, but I just wanted to clear some things up. What many of you were talking about was not DCT, and it was not traditional Catholic ethics. If I have time I will come back on and write about Aquinas’ understanding of God’s laws (Eternal, Divine, Natural, Human).
ps – one final note. God can, because He has the authority, command things to be done that are not necessarily good or evil in themselves, but it would be immoral to disobey them, like some of the ceremonial laws in the Old Testament. Or, like the Catholic Church does with fasting during Lent. It is does not go against our nature to eat meat on Friday, but because the Church has commanded it, it would be immoral (assuming we have full freedom and consent, etc) to willfully disobey.