John Chrysostom
Having said much about God's love for mankind and having shown God's ineffable providential care, His unspeakable and unsearchable goodness, the Apostle uses this very goodness to persuade those benefited by God to show a life worthy of the gift.
Being so great and exalted, he does not refuse to beseech them. Moreover, he beseeches them not for something that would serve his own benefit, but for something by which they themselves could benefit.
Is it any wonder that he does not refuse to beseech, when he presents the very mercy of God as the one beseeching?
Since from the mercies of God, he says, countless blessings have been poured upon you, be ashamed before them and fear them.
These very mercies address you with the request that you do nothing unworthy of them.
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And I, says the Apostle, beseech you by the same mercies by which you have been saved.
So also one who wishes to shame someone greatly benefited usually presents the benefactor himself as the one making the request.
What then do you beseech? Tell me. "Present your bodies as a living sacrifice, holy, well-pleasing to God, for your rational worship."
Since he said sacrifice, lest someone think that he commands bodies to be slain, he immediately added, "living."
Then, distinguishing it from the Jewish sacrifice, he continues: "holy, well-pleasing to God, your spiritual worship." The Jewish sacrifice was fleshly and not very well-pleasing.
Or: "What to Me is the multitude of your sacrifices?" (Isa 1:11). Or: "Who has required this from your hands?" (Isa 1:12), God says.
In many other places of Scripture we see that God rejects the Jewish sacrifices.
But He does not reject this sacrifice. On the contrary, He even requires it, even when the Jewish sacrifice has been offered.
Therefore He said: "He who offers the sacrifice of praise honors Me" (Ps 49:23).
Again it is said: "I will praise the name of my God with a song, and this will be more pleasing to the Lord than a bull with horns and hoofs" (Ps 68:31-32).
In another place, rejecting the Jewish sacrifice and saying, "Do I eat the flesh of bulls, or drink the blood of goats?" the Lord added: "Offer to God the sacrifice of praise, and pay your vows to the Most High" (Ps 49:13-14).
So also Paul commands here: "Present your bodies as a living sacrifice."
But how, you ask, can the body serve as a sacrifice? Let the eye look at nothing evil, and it has already become a sacrifice.
Let the tongue say nothing shameful, and it has become an offering. Let the hand do nothing lawless, and it has become a whole burnt offering.
Or rather, even this is not enough. We must also do good. Let the hand practice almsgiving, the mouth bless those who offend, and the hearing constantly exercise itself in listening to the word of God.
A sacrifice has no impurity. It is the firstfruits of all.
Let us therefore offer to God the firstfruits of hands, feet, mouth, and everything else. Such a sacrifice is well-pleasing, just as the Jewish sacrifice was impure.
It is said: "Their sacrifices shall be to them like the bread of mourning" (Hos 9:4).
But our sacrifice is not like this. In the Jewish sacrifice, what was offered became dead. Our sacrifice makes what is offered alive.
When we put our members to death, then we shall be able to live.
This manner of sacrifice is new, and therefore the kind of fire is unusual.
There is no need for wood or combustible matter. Our fire burns by itself and does not consume the sacrifice, but rather gives it life.
God required such a sacrifice from of old. Therefore the Prophet said: "A sacrifice to God is a broken spirit" (Ps 50:19).
The three youths offered such a sacrifice, saying: "At this time we have no prince, nor prophet, nor place to offer sacrifice to Thee and find Thy mercy. But with a contrite heart and humble spirit may we be accepted" (Dan 3:38-39).
Notice how the Apostle uses the word with great precision. He did not say, Make your bodies a sacrifice, but, "Present them."
By this he as though said: You no longer have anything in common with them. You have given them to another.
As those who have supplied warhorses no longer have ownership over them, so you also have supplied your members for the war against the devil, for this dread campaign.
Do not draw them away for your own services.
Here the Apostle also indicates that, when preparing to offer our members as a sacrifice, we must make them blameless.
We present them not to some man living on earth, but to the very King of the universe, God.
We present them not only to be used in war, but so that the King Himself may sit upon them.
The Lord does not refuse to sit upon our members. He even greatly desires it.
What a king who serves the same Lord as we would not choose, the Master of Angels chooses.
Therefore, if your members must be offered and become a sacrifice, cut off from them every defilement. As long as there is anything defiled in them, they cannot be a sacrifice.
Thus the eye, if it looks at things that arouse sensual pleasure, cannot be offered as a sacrifice.
Nor can a hand that seizes and covets, feet that limp in their movement and go to spectacles, or a belly that serves sensual pleasure and kindles passions for enjoyments.
Nor can a heart that nourishes anger or impure love, or a tongue that speaks shameful things.
Therefore we must examine from every side whether there is anything defiled in our body.
If those who offered Old Testament sacrifices were obliged to inspect everything, they were not permitted to offer what lacked an ear or tail, or what was covered with scab or leprosy.
How much more must we, who offer not irrational sheep but ourselves, observe greater care and be pure in every respect.
Then it will be possible for us to say with Paul: "For I am already being offered, and the time of my departure has come" (2 Tim 4:6).
Because Paul was purer than every sacrifice, he called himself a sacrifice.
This will happen with us too if we destroy the old man, put to death the earthly members, and crucify the world to ourselves.
In that case we shall no longer need a knife, altar, or fire.
Or, more correctly, we shall need all these, but not made by hands. Everything will be given to us from above: fire from above and a knife from above.
The breadth of heaven will be an altar for us.
If, when Elijah offered a sensible sacrifice, the flame that came down from heaven consumed everything, water, wood, and stones, then this will be accomplished all the more with you.
If you have something unstable and worldly, yet offer the sacrifice with a true disposition, then the descending fire of the Spirit will consume everything worldly and fulfill the whole offering.
What then is "spiritual, or rational, worship"? It is inward service, life in Christ.
The one who serves and ministers in God's house, whatever he may be at another time, collects himself during the service and becomes more reverent.
So also we must spend our whole life in such a disposition of spirit, as those who perform service to God and minister sacredly.
This will be so if each day you offer sacrifices to God and become priest of your body and of the virtue that arises in the soul.
For example, when you offer chastity, almsgiving, meekness, and guilelessness.
By fulfilling this, you will perform spiritual worship, that is, worship that has nothing bodily, crude, or sensual.
Thus, by the very names, he encouraged the listener and proved that each person becomes priest of his own body and life.
Then the Apostle also speaks of the means by which one can achieve success in everything.
What is this means? "Do not be conformed to this age, but be transformed by the renewal of your mind" (Rom 12:2).
The form of this age is attached to the earth. It is low, short-lived, and has nothing exalted, lasting, or sound. Everything in it is distorted.
If you wish to walk the right path, do not imprint upon yourself the form of the present life, because there is nothing constant or firm in it.
Therefore the Apostle called it a form, as he also says elsewhere: "For the form of this world is passing away" (1 Cor 7:31).
There is nothing constant or stable in it. Everything is temporary.
For this reason he said, "this age," indicating its corruption. By the word form, he indicated its material character.
Whether you point to wealth, glory, bodily beauty, pleasures, or anything else that people consider great, all this is only a form, not the real thing.
It is an appearance, a mask, and not any enduring substance.
But do not be conformed to this, the Apostle says. Rather, be transformed by the renewal of your mind.
He did not say, Be transformed outwardly, but, Be transformed in essence.
By this he shows that the world has only an outward form, while virtue has not an outward form, but a true and substantial form.
It has natural beauty and has no need of external adornment or shapes that appear and disappear at the same time. All such things disappear before they appear.
Therefore, if you cast away the outward appearance, you will at once attain the true form.
Nothing is weaker than vice. Nothing grows old so quickly.
Then, since it is characteristic of people to sin daily, the Apostle consoles the listener by telling him to be renewed daily.
As we do with houses, constantly repairing those that have become old, so do also with yourself.
Have you sinned today? Has your soul grown old? Do not despair and do not lose heart.
Renew it by repentance, tears, confession, and good works. Never cease doing this.
But how can we do this? "Do not be conformed to this age, but be transformed by the renewal of your mind" (Rom 12:2).
He says that the Bodiless One must be served not by bodily purity, but by what is bodiless in us, that is, by the mind.
Therefore one must bring to God not sheep and calves, but oneself as a whole burnt offering. This is what it means to present a "living sacrifice."