Break it down by external sources vs. internal sources of happiness.
In sum, then, Hume argues that the source of morality, our means of discerning moral distinctions, and the spring of moral motivation, must be the passions.
It attempts to challenge the claim that an external standard of morality prevents God from being sovereign by making him the source of morality and his character the moral law.
Religion necessarily is a source of morality, and morality is necessarily the place where we draw laws from.
This is the underlying question: is the source of morality individual or social?
You quote Douglas Kmiec saying, "Religion necessarily is a source of morality, and morality is necessarily the place where we draw laws from".
Why don't we say so? "Hardworking" is the ubiquitous political denominator of our age, source of morality, citizenship, respect and status.
To be sure, they proclaimed that religion was the source of morality and peppered their speeches and state papers with religious language.
We may have different beliefs about the source of morality's authority — God, social convention, human reason.
But some relativists argue that that there is no source of morality other than our attitudes (e.g., they argue for subjectivism), so cultural variation implies that morality is relative (Prinz, 2007).
