John 12:7

For this end did the Lord suffer the ointment to be poured upon His head, that His Church might breathe forth immortality. For saith [the Scripture], "Thy name is as ointment poured forth; therefore have the virgins loved Thee; they have drawn Thee; at the odour of Thine ointments we will run after Thee." Let no one be anointed with the bad odour of the doctrine of [the prince of] this world; let not the holy Church of God be led captive by his subtlety, as was the first woman. Why do we not, as gifted with reason, act wisely? When we had received from Christ, and had grafted in us the faculty of judging concerning God, why do we fall headlong into ignorance? and why, through a careless neglect of acknowledging the gift which we have received, do we foolishly perish?

He restored Lazarus to life and died in his stead. For after he had drawn [Lazarus] from the tomb and had seated himself at table with him, he was himself buried by the symbol of the ointment that Mary “poured over his head.” … Thus, [the Lord] came to Bethany, raised his friend and buried himself through the symbol of the ointment. He made Mary and Martha joyful and exposed both Sheol and greed, Sheol because it would not always be holding onto him and greed because it would not always be selling him.

What then saith Christ? "She hath done a good work for My burying." But why did He not expose the disciple in the case of the woman, nor say to him what the Evangelist hath declared, that on account of his own thieving he rebuked her? In His abundant longsuffering He wished to bring him to a better mind. For because He knew that he was a traitor, He from the beginning often rebuked him, saying, "Not all believe," and, "One of you is a devil." He showed them that He knew him to be a traitor, yet He did not openly rebuke him, but bare with him, desiring to recall him.

"Let her alone," He saith, "for against the day of My burying hath she done this." Again, He maketh mention of the traitor in speaking of His burial. But him the reproof reacheth not, nor doth the expression soften him, though sufficient to inspire him with pity: as if He had said, "I am burdensome and troublesome, but wait a little while, and I shall depart." This too he intended in saying, "But Me ye have not always."

But none of these things turned back that savage madman; yet in truth Jesus said and did far more than this, He washed his feet that night, made him a sharer in the table and the salt, a thing which is wont to restrain even the souls of robbers, and spake other words, enough to melt a stone, and this, not long before, but on the very day, in order that not even time might cause it to be forgotten. But he stood out against all.

And the Lord also makes it clear that the woman was free from any blame, whereby He covertly rebukes the traitor; not in His good judgment finding fault with things that were worthy of praise, but saying: Let her alone. And He said in defence of the anointing with the ointment, that it had been done, not out of luxuriousness, but because of a certain mystery which had reference to His burying; although she who did it was unaware of the design of the mystery. For many things have been both said and done with reference to a mystical type, when they who spoke and acted were unaware of it. Yet here again the Lord rebukes Judas, because he said this not out of piety, but because he was greedy of base gain, and was going for a little gain to betray his Master. For the burying and the allusion thus made to His death indicate this plainly.

It is as though Judas were asking an innocent question, and so our Lord simply and gently explained the mystery of what Mary’s action meant, namely, that he himself was about to die and that he was to be anointed for his burial with the spices. It was being granted to Mary (to whom it would not be permitted to anoint his dead body, although she greatly desired this) to render a service [to him while he was] still alive, since she would be unable [to perform it] after his death, for she would be prevented by his swift resurrection.

Then said Jesus, Let her alone: against the day of My burying hath she kept this: meaning that He was about to die, and that this ointment was suitable for His burial. So to Mary who was not able to be present, though much wishing, at the anointing of the dead body, was it given to do Him this office in His lifetime.

The Lord does not rebuke Judas, although He knows that he said this with the intention of a thief. For He did not wish to put him to shame, teaching us also to bear with such people for a long time. Nevertheless, the Lord covertly reproaches Judas for the betrayal and for the fact that he would betray Him to death out of covetousness.

Having narrated the traitor's indignation at the kindness shown by the woman, the Evangelist now shows how our Lord put a stop to it. First, our Lord answers the unjust criticism Judas spoke against the woman; secondly, he rejects the spiritual reason Judas pretended to have (v 8).

He says, Let her alone, i.e., do not stop her. For it is well known that many good works are done which if our advice had been sought before they were done, we would not have advised that they be done, because something better could possibly have been done. Yet after they are begun, so long as they are good, they should not be stopped. Thus, as Chrysostom says, before the woman had poured out the ointment, Jesus would perhaps have preferred that it be given to the poor, but now that it was done, he held back those who were trying to stop her, saying, Let her alone: "Do not prevent one who is able from doing good. If you are able, you also do good," as we read in Proverbs (3:27).

He adds, let her keep it for the day of my burial, foretelling both his approaching death and the kindness this woman was ready to do for him in his tomb if he had not precluded it by rising so soon, for as we read in Mark's Gospel (16:1): "Mary Magdalene," along with other women, "bought spices, so that they might go and anoint him." This is why he said, let her keep it for the day of my burial, not the identical ointment she used, but ointment of the same kind, in general or particular, or even a similar service. It is as though he were saying: Do not stop her from doing for me while I am alive what she will be unable to do for me when I am dead. For, as I said, she was prevented by the resurrection of Christ occurring so quickly. This is expressed in a clearer way in Mark (14:8): "She has anointed my body beforehand for burying."

But did she have foreknowledge of Christ's death? Not at all: for she did not understand what she was doing. Rather, she was moved to do it by a certain inner urge. It often happens that people are moved to do things that they do not understand, as in the case of Caiaphas, the high priest, who said, "You know nothing at all; you do not understand that it is expedient for you that one man should die for the people" (11:49). Things of this sort are called presages, because they take place before the event.