John 4:38

Even though he called himself the sower of the faith, the teaching of the faith nonetheless had its beginning before his coming in the flesh. It is obvious that it had already had a beginning through the prophets and the righteous ones who followed them. He also clearly shows that this beginning had been given by him as well. "I sent you, he says, to reap and enjoy the labor of others." After they worked hard to enable the seed of faith to remain among men and women, you came, and from this crop you gather them and lead them to faith. I would have not invited you to reap and enjoy the work of others if that cultivation was not mine from the beginning. Some I entrusted with sowing, others with reaping. I did so according to time and the different phases of cultivation.

He at length unveils to them the whole mystery, and having removed the dark cloak of words, renders most clear the understanding of His meaning. For the Saviour being a Lover of the Prophets, and a Lover of the Apostles, makes neither the labour of those to be apart from the hand of the Apostles, nor does He allot entirely to the holy Apostles the glorying in respect of those who should be saved through faith in Him: but having mingled as it were the toil of each with their mutual co-work, He says (and with great reason) that one shall be the honour to both. He affirms that the Apostles had entered into the labours of the holy Prophets, not suffering them to spring upon the good fame of those who proceded them, but persuading them rather to honour them, as having gone before them in labour and time. That this will be to us too a most beautiful lesson, who will refuse to admit?

"I sent you to reap that whereon ye bestowed no labors; other men labored, and ye are entered into their labors." By this He the more encourageth them; for when it seemed a very hard matter to go through all the world and preach the Gospel, He showeth them that it is even most easy. The very difficult work was that other, which required great labor, the putting in the seed, and introducing the uninitiated soul to the knowledge of God. But wherefore uttereth He these sayings? It is that when He sendeth them to preach they may not be confounded, as though sent on a difficult task. "For that of the Prophets," He saith, "was the more difficult, and the fact witnesseth to My word, that ye are come to what is easy; because as in harvest time the fruits are collected with ease, and in one moment the floor is filled with sheaves, which await not the revolutions of the seasons, and winter, and spring, and rain, so it is now. The facts proclaim it aloud." While He was in the midst of saying these things, the Samaritans came forth, and the fruit was at once gathered together. On this account He said, "Lift up your eyes, and look on the fields, that they are white." Thus He spake, and the fact was clear, and the words seen true by the event.