Well, that’s the thing about people who claim that they have access to the absolute truth. How do they know? I mean, God came down from Mt. Sinai and told you, I guess. But how does believing God told you so make it so? How do you know God was right to tell you so?
Or put it another way, if you’re up on Mt. Sinai, and God hands you the stone tablets, and you look at the tablets, how do you judge those tablets? Are you not allowed to say, “Yep, these look pretty good.”? If God is the ultimate arbiter of morality, and humans are fallible, how do you know that the entity handing you the tablets is really God? What if it’s Satan up there on the mountain? How do you tell the difference? Using your innate moral sense? How do you know that your innate moral sense works?
Or to put it another way, suppose you were an always chaotic evil creature, like an orc. You have an innate evil nature. Would you be able to realize that you were evil, or would evil seem good to you? So God hands you the tablets, and they seem good to you, but if you’re totally depraved you aren’t in any position to judge the goodness or badness of this system of God-given absolute morality.
And contrariwise, if you’re not totally depraved but merely fallible, if you really can judge this God-given absolute morality as good, then aren’t you relying on some innate ability to tell good from bad? How do you judge this innate ability?
Thing is, we don’t start out with first principles, choose moral axioms, and create moral systems from those principles. We start out as ferillized eggs of a particular species with a particular evolutionary history. We develop, we grow, we live, we die. We never start at the beginning, we always must start in the middle, because before we can even begin to talk about morality and logic we’ve had to have already learned and judged without knowing what we were doing.
And so, to anyone who believes in absolute morality or absolute truth, the questions is: how do you know? And your neighbor over there who also believes in absolute truth, how does he know, and did you notice that despite both believing in absolute truth the two of you don’t agree on what that absolute truth is?
So what to you appears like some logical contradiction of absolutely declaring that there are no absolutes is really simply epistemological humility. We’re here trying to live our lives according to our innate desires. We didn’t choose our desires, they are thrust upon us because we are the kind of creatures we are. I can’t choose to prefer the taste of dogshit to the taste of sugar, because I’m a human being, not a housefly. There are a million facts about me that I have no choice over, because I’m who I am, and not something else. And so I am compelled, because nothing else is possible, to muddle along as best I can. And the only difference is, you’re in the same boat even if you claim that God handed you those tablets. Clinging to those tablets is just your way of muddling along.
I don’t state that I know for a fact that your absolute morality is wrong, I just say that there’s no way I can judge whether your absolute morality is right or wrong, because I’m a fallible finite human being. And so are you. And I recognize that there are been lots of people throughout history who had ideas about truth and morality, and I think a lot of those ideas were nonsense. So where does that put us?