38 Pray ye therefore the Lord of the harvest, that he will send forth labourers into his harvest.
[AD 367] Hilary of Poitiers on Matthew 9:36-38
Figuratively; When salvation was given to the Gentiles, then all cities and towns were enlightened by the power and entrance of Christ, and escaped every former sickness and infirmity. The Lord pities the people troubled with the violence of the unclean Spirit, and sick under the burden of the Law, and having no shepherd at hand to bestow on them the guardianship of the Holy Spirit. But of that gift there was a most abundant fruit, whose plenty far exceeded the multitude of those that drank thereof; how many soever take of it, yet an inexhaustible supply remains; and because it is profitable that there should be many to minister it, He bids us ask the Lord of the harvest, that God would provide a supply of reapers for the ministration of that gift of the Holy Spirit which was made ready; for by prayer this gift is poured out upon us from God.

[AD 407] John Chrysostom on Matthew 9:36-38
The Lord would refute by actions the charge of the Pharisees, who said, He casteth out dæmons by the Prince of the dæmons; for a dæmon having suffered rebuke, does not return good but evil to those who have not shown him honour. But the Lord on the other hand, when He has suffered blasphemy and contumely, not only does not punish, but does not utter a hard speech, yea He shows kindness to them that did it, as it here follows, And Jesus went about all their towns and villages. Herein He teaches us not to return accusations to them that accuse us, but kindness. For he that ceases to do good because of accusation, shows that his good has been done because of men. But if for God's sake you do good to your fellow-servants, you will not cease from doing good whatever they do, that your reward may be greater.

Nor does Christ's goodness rest here, but He manifests His care for them, opening the bowels of His mercy towards them; whence it follows, And seeing the multitudes, he had compassion upon them.

This is an accusation against the rulers of the Jews, that being shepherds they appeared like wolves; not only not improving the multitude, but hindering their progress. For when the multitude marvelled and said, It was never so seen in Israel, these opposed themselves, saying, He casteth out dæmons by the prince of the dæmons. (vid. Ps. 102:19.)

He privately insinuates Himself to be the Lord; for it is He Himself who is Lord of the harvest. For if He sent the Apostles to reap what they had not sown, it is manifest that He sent them not to reap the things of others, but what He had sown by the Prophets. But since the twelve Apostles are the labourers, He said, Pray ye the Lord of the harvest, that he would send labourers into his harvest; and notwithstanding He added none to their number, but rather He multiplied those twelve many times, not by increasing their numbers, but by giving them more abundant grace.

He shows us that it is a great gift that one should have the power of rightly preaching, in that He tells them that they ought to pray for it. Also we are here reminded of the words of John concerning the threshing-floor, and the fan, the chaff, and the wheat.

[AD 420] Jerome on Matthew 9:36-38
Observe how equally in villages, cities, and towns, that is to great as well as small, He preaches the Gospel, not respecting the might of the noble, but the salvation of those that believe. It follows, Teaching in their synagogues; this was His meat, going about to do the will of His Father, and saving by His teaching such as yet believed not.

He first preached and taught, and then proceeded to heal sicknesses, that the works might convince those who would not believe the words. Hence it follows, Healing every sickness and every disease, for to Him alone nothing is impossible.

The great harvest denotes the multitude of the people; the few labourers, the want of instructors.

[AD 430] Augustine of Hippo on Matthew 9:36-38
(De Cons. Ev. ii. 29.) This account of the two blind men and the dumb dæmon is read in Matthew only. The two blind men of whom the others speak are not the same as these, though something similar was done with them. So that even if Matthew had not also recorded their cure, we might have seen that this present narrative was of a different transaction. And this we ought diligently to remember, that many actions of our Lord are very much like one another, but are proved not to be the same action, by being both related at different times by the same Evangelist. So that when we find cases in which one is recorded by one Evangelist, and another by another, and some difference which we cannot reconcile between their accounts, we should suppose that they are like, but not the same, events.

[AD 533] Remigius of Rheims on Matthew 9:36-38
Understand, 'of God;' for though temporal blessings are also proclaimed, yet they are not called The Gospel. Hence the Law was not called a Gospel, because to such as kept it, it held out not heavenly, but earthly, goods.

It should be known that those whom He healed outwardly in their bodies, He also healed inwardly in their souls. Others cannot do this of their own power, but can by God's grace.

Herein Christ shows in Himself the disposition of the good shepherd and not that of the hireling. Why He pitied them is added, Because they were troubled, and sick as sheep that have no shepherd—troubled either by dæmons, or by divers sicknesses and infirmities.

But when the Son of God looked down from heaven upon the earth, to hear the groans of the captives, straight a great harvest began to ripen; for the multitude of the human race would never have come near to the faith, had not the Author of human salvation looked down from heaven; and it follows, Then said he unto his disciples, The harvest truly is great, but the labourers are few.

For the number of the Apostles was small in comparison of so great crops to be reaped. The Lord exhorts His preachers, that is, the Apostles and their followers, that they should daily desire an increase of their number; Pray ye therefore the Lord of the harvest, that he would send forth labourers into his harvest.

Or, He then increased their number when He chose the seventy and two, and then when many preachers were made what time the Holy Spirit descended upon the believers.

[AD 1274] Glossa Ordinaria on Matthew 9:36-38
(non occ.) He taught in their synagogues the Gospel of the Kingdom, as it follows, Preaching the Gospel of the Kingdom.

(ap. Anselm.) By disease we may understand complaints of long standing, by sickness any lesser infirmity.

(ap. Anselm.) Or, troubled by dæmons, and sick, that is, benumbed and unable to rise; and though they had shepherds, yet they were as though they had them not.

(ap. Anselm.) The harvest are those men who can be reaped by the preachers, and separated from the number of the damned, as grain is beaten out from the chaff that it may be laid up in granaries.

[AD 420] Jerome on Matthew 9:37-38
(Verse 37, 38.) Indeed, the harvest is plentiful, but the laborers are few. Therefore, pray to the Lord of the harvest to send out laborers into his harvest. The abundant harvest signifies the multitude of people, while the few laborers represent a shortage of workers. And it is commanded to pray to the Lord of the harvest to send out laborers into his harvest. These are the laborers whom the Psalmist speaks of, saying: Those who sow in tears will reap with joy. Going forth, they went and wept, carrying their seeds. But when they come, they will come with joy, carrying their sheaves (Psalm 126:7-8). And to speak more plainly, the abundant harvest is the entire crowd of believers. However, the workers are few, like the apostles and those who imitate them and are sent to the harvest.

[AD 407] John Chrysostom on Matthew 9:38
Then to signify how great the gift is, He says, Pray ye the Lord of the harvest; and indirectly declares it to be His own prerogative. For after having said, Pray ye the Lord of the harvest; when they had not made any entreaty nor prayer, He Himself at once ordains them, reminding them also of the sayings of John, Matthew 3:12 of the threshing floor, and of the Person winnowing, and of the chaff, and of the wheat. Whence it is evident that Himself is the husbandman, Himself the Lord of the harvest, Himself the master and owner of the prophets. For if He sent them to reap, clearly it was not to reap what belongs to another, but what Himself had sown by the prophets.

But not in this way only was He indirectly encouraging them, in calling their ministry a harvest; but also by making them able for the ministry.
[AD 407] John Chrysostom on Matthew 9:38
He shows how great the gift is when he says, “Ask from the Lord of the harvest.” And in an inconspicuous manner Jesus indicates that he himself is the one who holds this authority. Then to signify how promising is the harvest, Jesus calls them to “pray therefore the Lord of the harvest.” In doing so he indirectly declares this lordship to be his own prerogative. For after having said, “pray therefore the Lord of the harvest” when they had not made any request or prayer, he himself at once appoints them, reminding them also of the sayings of John, about the threshing floor, the separation of the husks from the kernels of grain, the husks that are left over, and of the One who is winnowing. From this it is clear that he himself is the farmer, he himself is the Lord of the harvest, he himself is the master of the prophets. For if he sent them to gather the harvest, it is clear that they do not harvest what belongs to someone else. Instead, they harvest the things that he sowed through the prophets. In calling their ministry a harvest, he was encouraging them but also empowering them to this ministry.

[AD 1107] Theophylact of Ohrid on Matthew 9:38
The multitude in need of healing He calls the "harvest," and those who ought to teach them, "labourers." The "Lord of the harvest" is Christ Himself Who is Lord of prophets and apostles. This is made clear when He ordains the twelve without petitioning God. Listen, then: