Ok.
As a Christian I don't buy into a concept like "objective value"
if by objective value we mean things that are somehow valuable apart from the evaluation of any subject - in other words, things that are valuable in themselves.
Sometimes people defend objective values because they think that this is what the Christian worldview requires or because they want for there to be things out there that are
really valuable, regardless of our opinions that we ought to pursue and promote.
But I think a concept like objective value almost fails in its own definition. As soon as we begin to define it we see its absurdity.
Others think that because there is nothing out there that's "really valuable" and the only values that exist are subjective - things that we value as an individual or species - that right and wrong are malleable. They can change from person to person and culture to culture. There is no universal standard of right and wrong if there are no objective values. So we can do what we want to do.
This is not the Christian perspective so many Christians have thought that we should defend the notion of objective value but we shouldn't go that route.
So for the Christian, true value is based not in the finite subject (like a person, culture, or even a whole species). Neither is it based in any impersonal object (like a material object or an abstract principle). True value is based in the evaluation of an absolute subject - God himself. God, the creator and sustainer of the world, is also the supreme evaluator of the world. What he calls "good" is good and what he calls "evil" is evil.
Of course, God's evaluation is not arbitrary. Goodness is an attribute of God himself. God is good. Good is that which comes from God and operates according to his design. So God evaluates as good that which is rooted in his own character - which is the ultimate standard of goodness.
So, for the Christian, the ultimate standard of goodness or value is not something impersonal outside of God, neither is it based on the finite subject, but it is rooted in God himself, the only one who is good.
Clear as mud?