The fact that the argument still exists PROVES that neither side of any God-related argument can be proven or disproved. In response to the first line of that Epicurus quote, God says in his own Bible that he is not out to "prevent" evil. The Bible states that God gave us free will, and this free will is swayed by Satan into "evil" or "sin". God is certainly able to do absolutely anything He wants, but that is not His purpose, nor is it an obligation, because in spite of all the atrocities that have plagued mankind since the beginning of humanity, it is his intention for this balance of good and evil to exist. The fact that God lets evil happen does not make Him evil; evil, defined, is the lack of God.