Genesis 3:21

For as a snake does not creep on with open steps, but advances by the very minutest efforts of its several scales; so the slippery motion of falling away [from what is good] takes possession of the negligent only gradually, and beginning from a perverse desire for the likeness of God, arrives in the end at the likeness of beasts. Hence it is that being naked of their first garment, they earned by mortality coats of skins. For the true honor of man is the image and likeness of God, which is not preserved except it be in relation to Him by whom it is impressed. The less therefore that one loves what is one's own, the more one cleaves to God. But through the desire of making trial of his own power, man by his own bidding falls down to himself as to a sort of intermediate grade. And so, while he wishes to be as God is, that is, under no one, he is thrust on, even from his own middle grade, by way of punishment, to that which is lowest, that is, to those things in which beasts delight: and thus, while his honor is the likeness of God, but his dishonor is the likeness of the beast, "Man being in honor abideth not: he is compared to the beasts that are foolish, and is made like to them."

Just so our nature, becoming passional, had to encounter all the necessary results of a life of passion: but when it shall have started back to that state of passionless blessedness, it will no longer encounter the inevitable results of evil tendencies. Seeing, then, that all the infusions of the life of the brute into our nature were not in us before our humanity descended through the touch of evil into passions, most certainly, when we abandon those passions, we shall abandon all their visible results. No one, therefore, will be justified in seeking in that other life for the consequences in us of any passion. Just as if a man, who, clad in a ragged tunic, has divested himself of the garb, feels no more its disgrace upon him, so we too, when we have cast off that dead unsightly tunic made from the skins of brutes and put upon us (for I take the "coats of skins" to mean that conformation belonging to a brute nature with which we were clothed when we became familiar with passionate indulgence), shall, along with the casting off of that tunic, fling from us all the belongings that were round us of that skin of a brute; and such accretions are sexual intercourse, conception, parturition, impurities, suckling, feeding, evacuation, gradual growth to full size, prime of life, old age, disease, and death. If that skin is no longer round us, how can its resulting consequences be left behind within us?

Were these garments from the skins of animals? Or were they created like the thistles and thorns that were created after the other works of creation had been completed?

In other words, take the case of a kindly father with a son of his own who was brought up with every care, who enjoyed every indulgence, had the run of a fine house, was clad in a silken tunic, and had free access to his father's substance and wealth; later, when he saw him tumble headlong from this great indulgence into an abyss of wickedness, he stripped him of all those assets, subjected him to his own authority and, divesting him of his clothes, clad him in a lowly garment usually worn by slaves lest he be completely naked and indecent. Well, in just the same way the loving God, when they rendered themselves unworthy of that gleaming and resplendent vesture in which they were adorned and which ensured they were prepared against bodily needs, stripped them of all that glory and the enjoyment they were partakers of before suffering that terrible fall. He showed them great pity and had mercy on their fall: seeing them covered in confusion and ignorant of what to do to avoid being naked and feeling ashamed, he makes garments of skin for them and clothes them in them. What I mean is that the machinations of the devil are quite different: when he finds people ready to do his will, he proves their undoing through some slight enjoyment, then drags them down to the very depths of wickedness and covers them in utter shame and degradation, leaving them prostrate, a piteous spectacle for all to see whereas the Guardian of our souls, seeing them in utter helplessness, doesn't allow himself to ignore their condition but devises a covering for them, while indicating to them through the frugality of the garment the sort of garments they have caused themselves to deserve. "The Lord God made garments of skin for Adam and his wife, and clad them in them." See the extent of the considerateness of Sacred Scripture.

Having spoken of the punishment which the tempter and those tempted received, Scripture describes how "the Lord made garments of skin for Adam and Eve, and clothed them.