Against Marcion: Book II 11If, After Man's Sin, God Exercised His Attribute of Justice and Judgment, This Was Compatible with His Goodness, and Enhances the True Idea of the Perfection of God's Character.

Up to the fall of man, therefore, from the beginning God was simply good; after that He became a judge both severe and, as the Marcionites will have it, cruel. Woman is at once condemned to bring forth in sorrow, and to serve her husband, although before she had heard without pain the increase of her race proclaimed with the blessing, Increase and multiply, and although she had been destined to be a help and not a slave to her male partner. Immediately the earth is also cursed, which before was blessed. Immediately spring up briers and thorns, where once had grown grass, and herbs, and fruitful trees. Immediately arise sweat and labour for bread, where previously on every tree was yielded spontaneous food and untilled nourishment. Thenceforth it is "man to the ground," and not as before, "from the ground"; to death thenceforth, but before, to life; thenceforth with coats of skins, but before, nakedness without a blush. Thus God's prior goodness was from nature, His subsequent severity from a cause. The one was innate, the other accidental; the one His own, the other adapted; the one issuing from Him, the other admitted by Him. But then nature could not have rightly permitted His goodness to have gone on inoperative, nor the cause have allowed His severity to have escaped in disguise or concealment. God provided the one for Himself, the other for the occasion. You should now set about showing also that the position of a judge is allied with evil, who have been dreaming of another god as a purely good one--solely because you cannot understand the Deity to be a judge; although we have proved God to be also a judge. Or if not a judge, at any rate a perverse and useless originator of a discipline which is not to be vindicated--in other words, not to be judged. You do not, however, disprove God's being a judge, who have no proof to show that He is a judge. You will undoubtedly have to accuse justice herself, which provides the judge, or else to reckon her among the species of evil, that is, to add injustice to the titles of goodness. But then justice is an evil, if injustice is a good. And yet you are forced to declare injustice to be one of the worst of things, and by the same rule are constrained to class justice amongst the most excellent. Since there is nothing hostile to evil which is not good, and no enemy of good which is not evil. It follows, then, that as injustice is an evil, so in the same degree is justice a good. Nor should it be regarded as simply a species of goodness, but as the practical observance of it, because goodness (unless justice be so controlled as to be just) will not be goodness, if it be unjust. For nothing is good which is unjust; while everything, on the other hand, which is just is good.