That is basically consistent with the Bible, which says that the law of God is written on our hearts, and that our conscience bears witness to it (Romans 2:15). I think another thing that is interesting is that we even listen to it. In fact, from what I can tell, basically the majority of humanity does. Most societies seem to agree that theft, murder, and various other actions considered illegal are quite wrong, because they break the peace of society. I suppose we should ask ourselves, why do we think that? Have we all convinced each other that it's wrong, or is something else speaking to the fact that hurt and the breaking of peace is wrong? Why are humans consistently offended by, say, insults?
Maybe one could argue it's all based on survival, but we don't seem to think of it like maintaining survival. It seems to go deeper than that. We want to see what we think is good and right. We don't want just survival, we want complete peace, because we think it is good. Why do we think that? If good is not an objective thing, why do we want it so badly?
But then let's consider the fact that *not* everyone wants good. Some people prefer what we think is bad because it is more entertaining, or because they think of that evil as good instead, or vice versa. Yet still, we desire what we think is good, either for ourselves or the larger society as a whole.
Now, one might argue, if morality is objective, why do we want bad things anyway? If we know what is right, why do we desire what isn't? The fact is it's because we are not inherently good. We lie, we steal, we hurt. And if you think about it, we have all broken the peace on some scale, hugely or not. Could be a small lie, taking something of the most minimal value that wasn't yours, or just a tiny lustful thought about some person walking down the street. These things have a bad impact on those involved, whether we realize it or not. As you noted, they have meaning to us. A lot of what I said about meaning earlier may have sounded harsh, and that is because I was greatly emphasizing my point, but really the fact we find meaning in something *is* interesting. Why do we find that? Is it wishful thinking, a simply wrong view of life, or is it because there is something that says to us, whether we recognize it as a thing or not, "This means something."
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