I've heard a lot of atheists use the argument of evil against the concept of God, which essentially is that the existence of evil disproves God since God is meant to be all good, I think the opposite however, typically I respond to them by saying that the existence of evil points to the existence of good, since evil is the absence of good; and what standard is there for judging good without the concept of God? I've always thought it a good response to say that the fact that they have the moral criteria, the knowledge of moral law, to condemn God means that they have a Moral Law-Giver to whom they subconsciously appeal. Give me some feedback... is there an atheist response to this I haven't heard?