He argues the following:
1. If objective moral values exist, then God exists.
2. Objective moral values do exist
3. Therefore, God exists.
"Intrinsically-valuable, thinking persons do not come from impersonal, non-conscious, unguided, valueless processes over time. A personal, self-aware, purposeful, good God provides the natural and necessary context for the existence of valuable, rights-bearing, morally-responsible human persons. That is, personhood and morality are necessarily connected; moral values are rooted in personhood. Without God (a personal Being), no persons - and thus no moral values - would exist at all: no personhood, no moral values. Only if God exists can moral properties be realized."
You can find the rest of the article here.
For a different take on the Moral Argument, see this article by Peter S. Williams.
Courage and Godspeed,