XXIV. Of Those Who Live Between the Two.
You who thinkest that, by living doubtfully between the two, you are on your guard, go on your way stript of law, broken down by luxury. You are looking forward vainly to so many things, why do you seek unjust things? And whatever you have done shall there remain to you when dead. Consider, you foolish one, you were not, and lo, you are seen. You know not whence you have proceeded, nor whence you are nourished. You avoid the excellent and benignant God of your life, and your Governor, who would rather wish you to live.
You turn yourself to yourself, and give your back to God. You drown yourself in darkness, while you think you are abiding in light. Why do you run in the synagogue to the Pharisees, that He may become merciful to you, whom you of your own accord deniy? Thence you go abroad again; you seek healthful things. You wish to live between both ways, but thence you shall perish. And, moreover, you say, Who is He who has redeemed from death, that we may believe in Him, since there punishments are awarded?
Ah! not thus, O malignant man, shall it be as you think. For to him who has lived well there is advantage after death. You, however, when one day you die, shall be taken away in an evil place. But they who believe in Christ shall be led into a good place, and those to whom that delight is given are caressed; but to you who are of a double mind, against you is punishment without the body. The course of the tormentor stirs you up to cry out against your brother.
Source: Writings (New Advent)