[ThinkDifferent]

No matter what moral code you follow, no one can get away from the bottom-line decision that the code that they follow is better than any other. It is that decision that has no justification. You simply choose what you like better.

Yes, we pretty much agree. I'd argue that someone could choose the meta-code of "use the moral code which God commands", but even in that case they still have no ultimate justification for their preference of obedience.

[BikerNYC]

Yes. It is difficult for a theist to answer the question, "Why do what God commands?" Sometimes they say because it will get you into heaven. Then, you might say, we should do anything that makes us feel good.

[Tribune7]

It is that decision that has no justification. You simply choose what you like better.

Unless God exists and is an authority to whom you must account.