The first horn "is something good because the gods will it" or
The second horn "do the gods will it because it is good?” but now
The third option (that has no unwanted conclusion): it is not God's will that defines the good but his unchanging nature that governs his will and his commands to us.
With a third option, there is no dilemma. The defeater of the dilemma is to point out that God's goodness is a necessary property (which is a third option). Goodness is not a property that God could have lacked. As the greatest conceivable being, there is no possible world where God is not good.
The second horn "do the gods will it because it is good?” but now
The third option (that has no unwanted conclusion): it is not God's will that defines the good but his unchanging nature that governs his will and his commands to us.
With a third option, there is no dilemma. The defeater of the dilemma is to point out that God's goodness is a necessary property (which is a third option). Goodness is not a property that God could have lacked. As the greatest conceivable being, there is no possible world where God is not good.
