One does not need perfect and comprehensive knowledge of the consequences of one's moral activity in order to be able to reasonably identify those to whom one owes moral duties or obligations. And, surely, one does not need such perfect knowledge in order to provide counterexamples to your claim that all such duties are owed to God.
How d ...[text shortened]... rsuade the raping doctor of the wrongness of his action ? To whom further is he obligated?
In his probing book called The Grand Weaver, well-known apologist and author Ravi Zacharias records a story he once read. Let me give it to you in his own words:
The writer described a man aboard a plane who propositioned a woman sitting next to him for one million dollars. She glared at him but pursued the conversation and began to entertain the possibility of so easily becoming a millionaire. The pair set the time, terms, and conditions. Just before he left the plane, he sputtered, “I—I have to admit, ma’am, I have sort of, ah, led you into a lie. I, um, I really don’t have a million dollars. Would you consider the proposition for just—ah, say—ah, ten dollars?”
On the verge of smacking him across the face for such an insult, she snapped back, “What do you think I am?”
“That has already been established,” he replied. “Now we’re just haggling over the price.”
This begs the question, would you give into that temptation if the price was right?
There is a great audio clip about this here: