Please, I beg of you.
Don't use the moral argument for God to argue for God's existence. One may ask, "Hmm, moral argument for God? What is that all about?"
Well I'll tell you. Moral laws exist. Moral laws couldn't exist without a law maker. Therefore, there must be a lawmaker that exists and creates these laws. Humans can't be the creators of these laws because the moral laws transcend human laws. Sometimes, humans can be mistaken with regard to which laws are right or wrong. If God doesn't exist, humans are the only beings left who will make the laws. If one disagrees with a law made by humans, they have no higher standard to appeal to. So, they can't object to the human laws at all. So, if God doesn't exist, human laws are the top of the line, they are all we have. But clearly, moral relativism, the view that if a majority of humans agree on a law, then it's real is wrong. So is subjectivism, the view that morality is nothing more than a personal preference, nothing more than preferring turkey over ham on your sandwich. If God doesn't exist, it is either the individual or the society one lives in that gets to make the rules. Since this is false, there are rules outside of these systems, God must exist.
So, that's the argument. Where does it go wrong?
1. God can't make up any laws he wants and still be a good being. If God made up the law, "Everyone rape as much as possible" then that wouldn't make the law good, that would make God bad. So, it seems the laws must even transcend any God that may exist. Therefore, the "moral laws" cannot rely on any being.
2. What does it mean to say that God's laws are "better" or constitute a "higher standard" than human laws? One may saw that God is all-good, so his laws must be better. However, what does "all-good" mean? It must mean something other than "whatever God's laws dictate" otherwise, if God commanded rape, rape would become good. One must use a standard of good apart from God to state meaningfully that God is all-good. One may say that God is omniscient so in that way, his standard is better or higher. However, God merely exists as a signpost for morality, he is not then the creator of morality. So, this response fails to establish the argument. One may say that God is all-powerful, so his standard is better. However, the amount of power you have doesn't affect how good your laws are. What matters is that they allign with what is good, not that you have the power to enforce them.
With these two fundamental problems, one may wonder who uses this argument? Many people. One example is from the book titled I Don't Have Enough Faith to be an Atheist. In chapter 7, the writers defend this argument as sound. They spend pretty much the entire chapter proving that the moral law exists. They however spend no time at all linking the premise "the moral law exists" to the conclusion that "God exists." They surely don't respond to the Euthyphro Dilemma which is a 2,000 year old response to this argument and is basically a reformulation of point #1.
Here is another example of someone using the argument.
The writer defines something as moral if it adheres to a standard given by a legitimate authority. However, this runs into the same problems mentioned. What makes an authority legitimate? Because it's commands are good? And why are they good? And so on.
Here is his supposed solution to the Euthyphro dilemma.
"The Solution
The general strategy used to defeat a dilemma is to show that it's a false one. There are not two options, but three.
The Christian rejects the first option, that morality is an arbitrary function of God's power. And he rejects the second option, that God is responsible to a higher law. There is no Law over God.
The third option is that an objective standard exists (this avoids the first horn of the dilemma). However, the standard is not external to God, but internal (avoiding the second horn). Morality is grounded in the immutable character of God, who is perfectly good. His commands are not whims, but rooted in His holiness.
Could God simply decree that torturing babies was moral? "No," the Christian answers, "God would never do that." It's not a matter of command. It's a matter of character.""
However, if something is good because it agrees with God's character, we still have the same problem. If God's character were different, if God's character was such that he liked rape and as a result commanded it, then God would be evil. That wouldn't make rape good. Also, it isn't explained what it means for God's character to be "good." Does it mean that God's character is God's?
Also a related subject, some theists argue that if morality doesn't depend on God, then God must somehow be less powerful as a result. However, I find this to be a mirror image of a similar objection. Some people argue the same result would follow if logic doesn't depend on God. If God can't make false the law of noncontradiction, then God must be bounded by the rules of logic. So, this makes God trapped and forced to obey the rules of logic.
This idea is silly. What would it mean for God to make something exist and not exist at the same time? Is God any less powerful for not being able to do this? What would it mean for God to disobey the rules of logic? Or change them?
I think a similar consideration applies to God's inability to make rape good. Given certain facts about humans, it follows necessarily that rape is wrong. Much in the same way that it's necessarily false that something exists and doesn't exist at the same time. Given the fact that people don't like rape, it scars its victims for life, and so on, that necessarily makes rape wrong.
God can't make it so that the same things are true of rape that are true of it now, but make rape right. God can't hold the amount of pain and agony rape causes constant, but change how he feels about it and it would magically become right. This is because these facts cause rape to be wrong (obviously).
So basically, what people who argue in this fashion are saying is the following: God would be more powerful if he could hold all the facts about how much rape hurts its victims but magically change the moral status of rape. This claim, I argue, makes as much sense as saying God would be more powerful if he could create a square circle or a 10-sided triangle. It is logically impossible to do so, so it doesn't make any sense to say that a being can do it.
So, I don't think it handicaps Christianity or any other theistic belief to say that morality doesn't depend on God. Sure, morality may depend on God in an indirect manner. He created us with certain psychological mechanisms which causes us to hate being raped. Then, rape is wrong. He could have created us so that we didn't care about being raped, so in that sense, he causes rape to be wrong. However, this isn't the same as saying that God could have created us with the same psychological facts but instead made rape right. This is what those who say morality depends on God are saying (in some shape or form). It should be fairly obvious that they are wrong.
Little Buddy
1 hour ago