Luke 10:2

If, then, "the harvest is plenteous, but the labourers few," it is incumbent on us "to pray" that there may be as great abundance of labourers as possible.

And he said to them: The harvest indeed is great, but the laborers are few. Pray therefore the Lord of the harvest that he send laborers into his harvest. The great harvest signifies a multitude of peoples. The few laborers signify a scarcity of teachers. These are the laborers spoken of by the Psalmist: Those who sow in tears shall reap in joy. Going forth they went and wept, carrying their seeds. But coming back they will come with exultation, carrying their sheaves (Psalm 126). And to speak more clearly, the great harvest is the whole crowd of believers. The few laborers are the apostles and their imitators who are sent into the harvest.

When the preachers were sent, let us hear what he says: "The harvest indeed is great, but the laborers are few. Pray therefore the Lord of the harvest, that he send laborers into his harvest." For the great harvest the laborers are few, which we cannot speak of without heavy grief, because even if there are those who hear good things, there are none to speak them. Behold, the world is full of priests, yet in God's harvest a worker is found very rarely, because we have indeed taken up the priestly office, but we do not fulfill the work of the office. But consider, dearest brothers, consider what is said: "Pray the Lord of the harvest, that he send laborers into his harvest." Petition on our behalf, that we may be able to work worthily for you, lest our tongue grow sluggish from exhortation, lest after we have taken up the place of preaching, our silence condemn us before the just judge. For often the tongue of preachers is restrained because of their own wickedness; but often indeed it happens through the fault of those subject to them that the word of preaching is withdrawn from those who are in charge. Indeed the tongue of preachers is restrained because of their own wickedness, as the Psalmist says: "But to the sinner God said: Why do you declare my justices?" And again, because of the fault of those subject to them, the voice of preachers is forbidden, as the Lord says to Ezekiel: "I will make your tongue cleave to your palate, and you shall be mute, and not as a man who rebukes, because it is a provoking house." As if he were to say openly: Therefore the word of preaching is taken from you, because while the people provoke me in their actions, they are not worthy to receive the exhortation of truth. From whose fault, therefore, the word is withdrawn from the preacher is not easily known. But it is known most certainly that the silence of the Pastor sometimes harms himself, but always harms those subject to him.