"Let us assume for the moment that the Biblical position on rape is clear: God condemns rape. But why? One possibility is that He condemns rape because it is wrong. Why is it wrong? It might be supposed that God has various reasons for thinking rape is wrong: it violates the victim's rights, it traumatizes the victim, it undermines the fabric of society, and so on. All of these are bad making properties. However, if these reasons provide objective grounds for God thinking that rape is wrong, then they provide objective grounds for others as well. Moreover, these reasons would hold even if God did not exist. For example, rape would still traumatize the victim and rape would still undermine the fabric of society even. Thus, on this assumption, In this case, atheists could provide objective ground for condemning rape--the same grounds used by God.
"Let us suppose now that rape is wrong because God condemns it. In this case, God has no reasons for His condemnations. His condemnation makes rape wrong and it would not be wrong if God did not condemned it. Indeed, not raping someone would be wrong if God condemned not raping. However, this hardly provides objective grounds for condemning rape: Whether rape is right or wrong would be based on God's arbitrary condemnation. On this interpretation, if atheists can provide no objective grounds for condemning rape, they are no worse off than theists. However, as we have seen, there is no reason to suppose that they cannot provide such grounds.
"Theists such as Greg Bahnsen and John Frame suppose that the above dilemma can be avoided by basing morality on the necessary attributes of God's character rather than directly on His condemnation.[12] It may seem that to say that God condemns rape as wrong because His character is necessarily good avoids the dilemma, but this is an illusion. Bahnsen argued that in the Euthyphro Plato set up a "false antithesis":
"Unfortunately, however, Bahnsen's position is not clear. The quotation suggests both that something is good because God approves of it and that God approves of it because it is good. But these two positions cannot both be maintained at once. Suppose that "X because of Y" means "X is caused by Y". This would mean that when one says that rape is bad because God disapproved of it one means that God caused rape to be bad by disapproving of it. But if one says that God disapproved of rape because it is bad, this would mean that the badness of rape caused God to disapprove of it. But how can what God caused by disapproving of it have caused God to disapprove of it? If "X because of Y" means "Y is the reason for X," a similar problem arises. If the reason for rape being bad is God's disapproval of it, how can it be the case that rape being bad is the reason for God's disapproval of rape?
"In any case, appealing to God's character only postpones the problem since the dilemma can be reformulated in terms of His character. Is God's character the way it is because it is good or is God's character good simply because it is God's character? Is there an independent standard of good or does God's character set the standard? If God's character is the way it is because it is good, then there is an independent standard of goodness by which to evaluate God's character. For example, suppose God condemns rape because of His just and merciful character. His character is just and merciful because mercy and justice are good. Since God is necessarily good, God is just and merciful. According to this independent standard of goodness, being merciful and just is precisely what a good character involves. In this case, even if God did not exist, one could say that a merciful and just character is good. Human beings could use this standard to evaluate peoples' character and actions based on this character. They could do this whether or not God exists.
"Suppose God's character is good simply because it is God's character. Then if God's character were cruel and unjust, these attributes would be good. In such a case God might well condone rape since this would be in keeping with His character. But could not one reply that God could not be cruel and unjust since by necessity God must be good? It is true that by necessity God must be good. But unless we have some independent standard of goodness then whatever attributes God has would by definition be good: God's character would define what good is. It would seem that if God could not be cruel and unjust, then God's character must necessarily exemplify some independent standard of goodness. Using this standard one could say that cruelty and injustice are not good whether God exists or not.
"This attempt to avoid the dilemma by basing objective morality on God's necessary character has another problem. It assumes that there would not be an objective morality without God. However, this seems to beg the question against an objective atheistic ethics. After all, why would the nonexistence of God adversely affect the goodness of mercy, compassion, and justice? Yet, this is precisely what would happen if being part of God's character created the goodness of mercy, compassion and justice. This point can perhaps be made in another way. One could affirm the objective immorality of rape and deny the existence of God with perfect consistency. There is no contradiction in claiming "Rape is objectively evil and God does not exist."[14]"
~ Atheism, Christian Theism, and Rape (1997). Michael Martin.
"Let us suppose now that rape is wrong because God condemns it. In this case, God has no reasons for His condemnations. His condemnation makes rape wrong and it would not be wrong if God did not condemned it. Indeed, not raping someone would be wrong if God condemned not raping. However, this hardly provides objective grounds for condemning rape: Whether rape is right or wrong would be based on God's arbitrary condemnation. On this interpretation, if atheists can provide no objective grounds for condemning rape, they are no worse off than theists. However, as we have seen, there is no reason to suppose that they cannot provide such grounds.
"Theists such as Greg Bahnsen and John Frame suppose that the above dilemma can be avoided by basing morality on the necessary attributes of God's character rather than directly on His condemnation.[12] It may seem that to say that God condemns rape as wrong because His character is necessarily good avoids the dilemma, but this is an illusion. Bahnsen argued that in the Euthyphro Plato set up a "false antithesis":
Quote: truth of the matter is that good is not independent of God. Certain behavior is good because God approves of it, and God approves of it because it is the creaturely expression of His holiness -- in other words, it is good. To be good is to be like God, and we can only know what behavior is good if God reveals and approves of it. The important point is that good is what God approves and cannot be ascertained independent of Him. . .[13]
"Unfortunately, however, Bahnsen's position is not clear. The quotation suggests both that something is good because God approves of it and that God approves of it because it is good. But these two positions cannot both be maintained at once. Suppose that "X because of Y" means "X is caused by Y". This would mean that when one says that rape is bad because God disapproved of it one means that God caused rape to be bad by disapproving of it. But if one says that God disapproved of rape because it is bad, this would mean that the badness of rape caused God to disapprove of it. But how can what God caused by disapproving of it have caused God to disapprove of it? If "X because of Y" means "Y is the reason for X," a similar problem arises. If the reason for rape being bad is God's disapproval of it, how can it be the case that rape being bad is the reason for God's disapproval of rape?
"In any case, appealing to God's character only postpones the problem since the dilemma can be reformulated in terms of His character. Is God's character the way it is because it is good or is God's character good simply because it is God's character? Is there an independent standard of good or does God's character set the standard? If God's character is the way it is because it is good, then there is an independent standard of goodness by which to evaluate God's character. For example, suppose God condemns rape because of His just and merciful character. His character is just and merciful because mercy and justice are good. Since God is necessarily good, God is just and merciful. According to this independent standard of goodness, being merciful and just is precisely what a good character involves. In this case, even if God did not exist, one could say that a merciful and just character is good. Human beings could use this standard to evaluate peoples' character and actions based on this character. They could do this whether or not God exists.
"Suppose God's character is good simply because it is God's character. Then if God's character were cruel and unjust, these attributes would be good. In such a case God might well condone rape since this would be in keeping with His character. But could not one reply that God could not be cruel and unjust since by necessity God must be good? It is true that by necessity God must be good. But unless we have some independent standard of goodness then whatever attributes God has would by definition be good: God's character would define what good is. It would seem that if God could not be cruel and unjust, then God's character must necessarily exemplify some independent standard of goodness. Using this standard one could say that cruelty and injustice are not good whether God exists or not.
"This attempt to avoid the dilemma by basing objective morality on God's necessary character has another problem. It assumes that there would not be an objective morality without God. However, this seems to beg the question against an objective atheistic ethics. After all, why would the nonexistence of God adversely affect the goodness of mercy, compassion, and justice? Yet, this is precisely what would happen if being part of God's character created the goodness of mercy, compassion and justice. This point can perhaps be made in another way. One could affirm the objective immorality of rape and deny the existence of God with perfect consistency. There is no contradiction in claiming "Rape is objectively evil and God does not exist."[14]"
~ Atheism, Christian Theism, and Rape (1997). Michael Martin.