16 At present I would call attention to the fact, that when the Manichæans, although they disguise their blasphemous absurdities under the name of Christianity, bring such objections against the Christian Scriptures, we have to defend the authority of the divine record in both Testaments against the Manichæans as much as against the Pagans. A Pagan might find fault with passages in the New Testament in the same way as Faustus does with what he calls unworthy representations of God in the Old Testament; and the Pagan might be answered by the quotation of similar passages from his own authors, as in Paul's speech at Athens. Even in Pagan writings we might find the doctrine that God created and constructed the world, and that He is the giver of light, which does not imply that before light was made He abode in darkness; and that when His work was finished He was elated with joy, which is more than saying that He saw that it was good; and that He made a law with rewards for obedience, and punishments for disobedience, by which they do not mean to say that God was ignorant of the future, because He gave a law to those by whom it was to be broken. Nor could they make asking questions a proof of a want of foresight even in a human being; for in their books many questions are asked only for the purpose of using the answers for the conviction of the persons addressed: for the questioner knows not only what answer he desires, but what will actually be given. Again, if the Pagan tried to make out God to be envious of any one, because He will not give happiness to the wicked, he would find many passages in the writings of his own authors in support of this principle of the divine government.
Source: Reply to Faustus the Manichaean (New Advent)