This leads us to the subject of a priori arguments for God's moral goodness. The atheist needs such arguments, no less than the eutheist does, since unless God could not exist without being morally good, the argument from evil cannot establish God's non-existence. I will mention briefly four traditional arguments for the goodness of God. The Perfection of God. God is perfect, and evil is a privation, so God cannot be evil.
Moral evil is the absence of some possible good, such as wisdom, love or self-control.
God cannot lack any possible good, so God cannot be evil in any respect. God is identical to the property of goodness itself. There must be such a property, since good things do exist. Since God is the first cause of all good things, God must be good Himself. Since God is absolutely simple, God is identical to His own essence.