@aaqucnaona
Of course there are no debts in nature but we're talking about being indebted to God not nature and being indebted to God completely depends on God's will and what God obligates us for and what God obligates us for of course supercedes morality, morality is just part of what God obligates us for.
We are not indebted to god for oxygen, it is a completely naturalitic and emergent property of life on earth. How do we know about God's will when we cannot be certain that He even exists? Superceding morality, i.e. millions of years of altruism is the stuff that causes 9/11s - that is not what any God worth his name would want us to do.