I don't know any parents that actually believe that.
You're fortunate to have been spared, then.
It is extremely unlikely that natural selection would select for a desire for something that has no survival value.
A belief or habit of mind might not have survival value in itself, but be a side-effect of something which did. A belief that one's life had ultimate meaning could be a side-effect of a general sense that one's life was good or important, and perhaps those who lacked such a sense would be too willing to throw their lives away.
Something exists objectively from the human perspective if it exists outside human thought and desire.
"It exists objectively
from the human perspective" sounds oxymoronic: it's not objective in itself, it's just relatively objective, to us? What does that mean? What's the distinction between "exists objectively" and "exists objectively from the human perspective"? Are there some things that "exist objectively," period, and others that only "exist objectively from the human perspective"? Like what?
And "it exists outside human thought and desire" is still ambiguous. So, again, if we're talking about the value of something, does that phrase mean:
A) The value of something exists objectively from the human perspective if, and only if, some non-human assigns value to it, or
B) The value of something exists objectively from the human perspective if, and only if, that value does not depend on human opinion about it, or
C) Something else?
I am trying to understand the underpinnings and rationale of your morality.
I don't think I've made that a particularly knotty problem.
Since the Christian God uses and has used thru eternity language to communicate with the other members of the Godhead...
You think it's an established fact that one person of the Trinity speaks to other persons by saying grammatical sentences out loud, or by projecting such sentences into the others' minds? If that's not what you mean, why call it a "language"? If that is what you mean, what is the basis for saying that?
as our creator it means our language is based on the objective form of language of the Godhead...
It doesn't mean that at all. Even if God created us, it does not follow that everything we do retains the form by which God does it. God might do things in ways which are incomprehensibly foreign to us, not at all imitatable by us.
And I still don't know what an "objective form of language" could mean. If the Father spoke to the Son in Hebrew, that wouldn't mean that Hebrew was "the objective form of language," it would only mean that that was the language spoken between the two of them.
which also provides ultimate meaning, unlike the case if there was no Christian God, in which case language and its meanings are purely subjective and without any ultimate meaning.
What does it mean to say that there's a "form of language" which "provides ultimate meaning"? Something ultimately true can be expressed in one kind of syntax, but not another kind? One set of vocabulary items, but not another kind? That just sounds like nonsense to me, even aside from the idea that the right kind of syntax or vocabulary can be traced back to the conversations among the persons of the trinity, which makes it doubly nonsensical.
Using Gods moral principles in the Bible to guide us we can be more likely to make the correct decision.
I haven't found this to be the case among those who insisted they were "using God's moral principles in the Bible."
Take a good look at history. You dont see much corruption?
Your claim: Christianity tells us, and tells us truly, that moral reasoning is the one area of our humanity that is most distorted and corrupted and the least trustworthy.
Your evidence: a lot of people have done a lot of very bad things.
This is a fact which is of course also recognized by Jews, Muslims, Hindus and Buddhists. As such it is not obviously evidence at all for the superior truth of Christianity.