Marco, at El Blog de Marcos (via Philosophers’ Carnival), entertains the possibility of God-dependant morality while avoiding the Euthyphro dilemma. (I don’t really like Wikipedia’s summary but it’ll suffice for now. I’ve also written on the topic here and here. Even better, read the dialogue and decide for yourself.) Here’s Marco’s suggestion:

[W]hat if we see God as decreeing the particular laws he does for non-moral reasons (i.e. reasons other than those like ‘… is wrong)? This avoids the dispensability-of-God problem as well as the arbitrariness problem.

In fact, it avoids neither problem because it fails to account for God’s motivation for “decreeing the particular laws [H]e does for non-moral reasons”. Let’s say God decrees a law for non-moral reasond r. Did God choose non-moral reason r by throwing dice or is there a deeper motivation? If the former, arbitrariness stares us in the face. If the latter, non-moral reason r becomes irrelavent and the original dilemma returns.

Marco, however, offers another reason why the suggested solution fails.

[T]he only proper way to conceive of the demandingness of morality is as consisting in the fact that all humans rationally ought to be susceptible to moral motivation - and it seems this account gets the phenomenology of goodness wrong. It looks like moral motivation would have to be just a case of being motivated to do whatever God decrees, read de dicto (i.e. motivated to act merely because God decrees it).

This touches on what I find to be a common mistake in understanding genuine religious motivation. One can be (and, I would argue, should be) motivated both by loyalty to God’s authoritative word and a morality independent of that word simultaneously. Engaging in an intimate relationship with God is a good in and of itself. If a given activity brings one closer to God, even if only because God requires it, then that activity’s goodness is independent of the divine command per se. It is dependent, rather, on the moral value of acheiving closeness to God.

The Euthyphro demonstrates that morality cannot be definitionally dependent on God’s word. In other words, defining morality as that which God desires or commands does indeed entail the contradiction that Plato so brilliantly illustrates. What I’ve suggested here, however, is an indirect dependence by which an activity is good because of the particular God-Man relationship it creates and cultivates.