4 Augustine replied: Poor safety, indeed! When you contradict yourself by hating the patriarchs as impure, at the same time that you grieve for your impure god. You allow that, since the advent of the Saviour, the patriarchs have had purity restored, and have enjoyed the rest of the blessed; while your god, even after the Saviour's advent, still lies in darkness, is still sunk in the ocean of iniquity, still wallows in the mire of all uncleanness. These men, therefore, were not only better than your god in their lives, but also happier in their death.
Where was the abode of the just who departed from this life before Christ's coming in the flesh, and whether their condition also was improved by the passion of Christ, in whom they had believed as to come, and to suffer, and to rise again, and had, moreover, foretold this in suitable language under the guidance of the Spirit of prophecy, is to be discovered from the Holy Scriptures, if any clear discovery in this matter is possible; we are not called on to adopt the crude notions of all and sundry, still less the heretical opinions of men who have gone astray into such egregious error.
There is a vain attempt here on the part of Faustus to introduce by a side-door the idea that we may obtain something after this life besides the due reward of our conduct in this life. It will be better for you to abandon your error while you are still alive, and to embrace and hold the truths of the Catholic faith. Otherwise the expectations of the unrighteous will be sadly disappointed when God begins to fulfill His threatenings to the unrighteous.
Source: Reply to Faustus the Manichaean (New Advent)