Joel 2:28-30

Verse 28

Shall come to pass afterward - אחרי כן acharey ken, "after this;" the same, says Kimchi, as in the latter days, which always refers to the days of the Messiah; and thus this prophecy is to be interpreted: and we have the testimony of St. Peter, Act 2:17, that this prophecy relates to that mighty effusion of the Holy Spirit which took place after the day of pentecost. Nor is there any evidence that such an effusion took place, nor such effects were produced, from the days of this prophet till the day of pentecost. And the Spirit was poured out then upon all flesh, that is, on people of different countries, speaking the languages of almost all the people of the earth; which intimated that these were the first-fruits of the conversion of all the nations of the world. For there was scarcely a tongue in the universe that was not to be found among the Parthians, Medes, Elamites, Mesopotamians, Jews, Cappadocians, people of Pontus, of Asia, Phrygia, Pamphylia, Egypt, Libya, Cyrene, Rome, Crete, and Arabia, who were residents at Jerusalem at that time; and on whom this mighty gift was poured out, each hearing and apprehending the truths of the Gospel, in his own language wherein he was born. Thus we have Divine authority for saying, that was the fulfillment of this prophecy by Joel. And the mighty and rapid spread of the Gospel of Christ in the present day, by means of the translation of the Scriptures into almost all the regular languages of the world, and the sending missionaries to all nations, who preach the Gospel in those tongues, are farther proofs that the great promise is in the fullest progress to be speedily fulfilled, even in the utmost sense of the words.

Your sons and your daughters shall prophesy - Shall preach - exhort, pray, and instruct, so as to benefit the Church.

Your old men shall dream dreams - Have my will represented to them in this way, as the others by direct inspiration.

Your young men shall see visions - Have true representations of Divine things made upon their imaginations by the power of God; that they shall have as full an evidence of them as they could have of any thing that came to the mind through the medium of the senses.
Verse 29

And also upon the servants and upon the handmaids - The gifts of teaching and instructing men shall not be restricted to any one class or order of people. He shall call and qualify the men of his own choice; and shall take such out of all ranks, orders, degrees, and offices in society. And he will pour out his Spirit upon them; and they shall be endowed with all the gifts and graces necessary to convert sinners, and build up the Church of Christ on its most holy faith.

And this God has done, and is still doing. He left the line of Aaron, and took his apostles indiscriminately from any tribe. He passed by the regular order of the priesthood, and the public schools of the most celebrated doctors, and took his evangelists from among fishermen, tent-makers, and even the Roman tax-gatherers. And he, lastly, passed by the Jewish tribes, and took the Gentile converts, and made them preachers of righteousness to the inhabitants of the whole earth. The same practice he continues to the present day; yet he did not then pass by a man brought up at the feet of Gamaliel, no more than he would now a man brought up in a celebrated seminary of learning. He is ever free to use his own gifts, in his own way; and when learning is sanctified, by being devoted to the service of God, and the possessor is humble and pious, and has those natural gifts necessary for a public teacher, perhaps we might safely say, God would in many cases prefer such: but he will have others, as intimated in the prophecy, that we may see the conversion of men is not by human might, nor power, but by the Spirit of the Lord of hosts. The learned man can do nothing without his Spirit; the unlearned must have his gifts and graces, without which both their labors would be unprofitable; and thus the excellency of the power is of God, and no flesh can glory in his presence. See my sermon on this passage.
Verse 30

Wonders in the heavens and in the earth - This refers to those dreadful sights, dreadful portents, and destructive commotion, by which the Jewish polity was finally overthrown, and the Christian religion established in the Roman empire. See how our Lord applies this prophecy, Mat 24:29 (note), and the parallel texts.
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