[Daniel 5:19] "'He slew whomever he would and smote to death whomever he wished to; those whom he wished he set on high, and brought low whomever he would.'" Thus he sets forth the example of the king's great-grandfather, in order to teach him the justice of God and make it clear that his great-grandson too was to suffer similar treatment because of his pride. Now if Nebuchadnezzar slew whomever he would and smote to death whomever he wished to; if he set on high those whom he would and brought low whomever he wished to, there is certainly no Divine providence or Scriptural injunction behind these honors and slayings, these acts of promotion and humiliation. But rather, such things ensue from the will of the men themselves who do the slaying and promoting to honor, and all the rest. If this be the case, the question arises as to how we are to understand the Scripture: "The heart of a king reposes in the hand of God; He will incline it in whatever direction He wishes" (Proverbs 21:1). Perhaps we might say that every saint is a king, for sin does not reign in his mortal body, and his heart therefore is kept safe, for he is in God's hand (Romans 6:1-23). And whatever has once come into the hand of God the Father, according to the Gospel, no man is able to take it away (John 10:28). And whoever is taken away, it is understood that he never was in God's hand at all.
Someone who turns his heart and mind to righteousness will undoubtedly blush and condemn himself when he thinks back on what he did before, when he was acting under the power of sin, for “the end of those things is death.” But what death, I ask? Certainly not the death that is common to us all.… Is it perhaps that which is called the death of sin, as when Scripture says: “The soul which sins will surely die.” Or should it rather be understood as referring to that death by which we die with Christ to sin and put an end to wickedness and crimes, so that it can be said, as it is here, that death is the end of them? Paul compares fruits with fruits and declares that the fruits of sin for which we are now ashamed because we have been set free from sin and become servants of God end in death, whereas the fruits of righteousness, which lead to sanctification, end in eternal life.
What are the fruits of sin? Learning from them what a good life is we are ashamed by the way we lived so wickedly before. And it is not only that the opinion of the pagans is wicked but also the heresy which is found most of all in Phrygia, to which only a morally corrupt person would belong, in which there is no sacrament and Christian piety has died out. Behold a freedom full of sins and bound by wickedness, whose deeds have only shame as their reward and whose end is death! Our departure is the end of this life and its deeds, and either death or life will succeed it. But here the word death has a double meaning, for it shifts from one kind of death to another.
So great was the slavery, that even the recollection of it now makes you ashamed; but if the recollection makes one ashamed, the reality would much more. And so you gained now in two ways, in having been freed from the shame; and also in having come to know the condition you were in; just as then you were injured in two ways, in doing things deserving shame, and in not even knowing to be ashamed. And this is worse than the former. Yet still ye kept in a state of servitude. Having then proved most abundantly the harm of what took place then from the shame of it, he comes to the thing in question. Now what is this thing? "For the end of those things is death." Since then shame seems to be no such serious evil, he comes to what is very fearful, I mean death; though in good truth what he had before mentioned were enough. For consider how exceeding great the mischief must be, inasmuch as, even when freed from the vengeance due to it, they could not get free of the shame. What wages then, he says, do you expect from the reality, when from the bare recollection, and that too when you are freed from the vengeance, you hide your face and blush, though under such grace as you are! But God's side is far otherwise.
If even the recollection of your former slavery makes you ashamed, think how much more the reality of it would do so. You have gained in two ways—by being set free from your former shame and by having come to recognize your past life for what it was.
[AD 420] Jerome on Romans 6:1-23