One would do well to compare what it says in Joel, from which Peter quoted.
Joe 2:28 KJV And it shall come to pass AFTERWARD,
that I will pour out my spirit upon all flesh; and your sons and your daughters shall prophesy, your old men shall dream dreams, your young men shall see visions:
Act 2:17 KJV And it shall come to pass IN THE LAST DAYS, saith God, I will pour out of my Spirit upon all flesh: and your sons and your daughters shall prophesy, and your young men shall see visions, and your old men shall dream dreams:
It's virtually word for word with the exception of Peter substituting "in the last days" for "afterward". In Joel, it refers to what was previously just stated:
Joe 2:20-27 KJV 20 But I will remove far off from you the northern
army, and will drive him into a land barren and desolate, with his face toward the east sea, and his hinder part toward the utmost sea, and his stink shall come up, and his ill savour shall come up, because he hath done great things. 21 Fear not, O land; be glad and rejoice: for the LORD will do great things. 22 Be not afraid, ye beasts of the field: for the pastures of the wilderness do spring, for the tree beareth her fruit, the fig tree and the vine do yield their strength. 23 Be glad then, ye children of Zion, and rejoice in the LORD your God: for he hath given you the former rain moderately, and he will cause to come down for you the rain, the former rain, and the latter rain in the first
month. 24 And the floors shall be full of wheat, and the fats shall overflow with wine and oil. 25 And I will restore to you the years that the locust hath eaten, the cankerworm, and the caterpiller, and the palmerworm, my great army which I sent among you. 26 And ye shall eat in plenty, and be satisfied, and praise the name of the LORD your God, that hath dealt wondrously with you: and my people shall never be ashamed. 27 And ye shall know that I
am in the midst of Israel, and
that I
am the LORD your God, and none else: and my people shall never be ashamed.
Peter didn't quote this part of Joel. There are two important elements in this unquoted portion of Joel, [that will take place] beforehand...
1. Removing the northern army, and
2. Ye shall know that I am in the midst of Israel. And then comes the "afterward".
Peter was alluding to (he rightfully understood) the pouring out of the Holy Spirit afterwards upon ALL flesh. He rightfully recognized that what was being witnessed (by those around him who had asked) was the same manifestation of the spirit that would take place in the last days afterward of the events prior mentioned by Joel. The reason that Peter didn't include the prior verses from Joel was because the future fulfillment of Joel will truly be upon all flesh, as in all the house of Israel that survives the events of those days. This future fulfillment of Joel will be upon the whole remnant of Israel, as per Isaiah 10 (which Paul also understood and quoted in Romans 9 - 11) that [in that day] "though the house of Israel be [numbered] as the sand of the sea, yet only THE remnant would return unto the Lord GOD ".
Isa 10:20-23 KJV 20 And it shall come to pass in that day,
that the remnant of Israel, and such as are escaped of the house of Jacob, shall no more again stay upon him that smote them; but shall stay upon the LORD, the Holy One of Israel, in truth. 21 The remnant shall return,
even the remnant of Jacob, unto the mighty God. 22 For though thy people Israel be as the sand of the sea,
yet a remnant of them shall return: the consumption decreed shall overflow with righteousness. 23 For the Lord GOD of hosts shall make a consumption, even determined, in the midst of all the land.
Peter didn't say it was the last days, but only that what they were witnessing is what will happen in the last days... afterward! [UPON ALL FLESH]
A similar [THOUGHT] should also be taken for Peter's words in:
2Pe 3:2-4 KJV 2 That ye may be mindful of the words which were spoken before by the holy prophets, and of the commandment of us the apostles of the Lord and Saviour: 3 Knowing this first, that there shall come in the last days scoffers, walking after their own lusts, 4 And saying, Where is the promise of his coming? for since the fathers fell asleep, all things continue as
they were from the beginning of the creation.
Peter is here also referencing a future time, in which he calls it "the last days", when men shall say,
2Pe 3:4-7 KJV 4 And saying, Where is the promise of his coming? for since the fathers fell asleep, all things continue as
they were from the beginning of the creation. 5 For this they willingly are ignorant of, that by the word of God the heavens were of old, and the earth standing out of the water and in the water: 6 Whereby the world that then was, being overflowed with water, perished: 7 But the heavens and the earth, which are now, by the same word are kept in store, reserved unto fire against the day of judgment and perdition of ungodly men.
Just before the DOTL begins, [yet it will be after the parousia/ coming of Christ, that] the survivors of the coming great tribulation will think (expressively) that they have escaped the judgment of God upon the wicked men of this world. But he says that this world will not perish [even by fire] before the judgment and perdition of ungodly men has taken place first...
2Pe 3:10-12 KJV 10 But the day of the Lord will come as a thief in the night; in the which the heavens shall pass away with a great noise, and the elements shall melt with fervent heat, the earth also and the works that are therein shall be burned up. 11
Seeing then
that all these things shall be dissolved, what manner
of persons ought ye to be in
all holy conversation and godliness, 12 Looking for and hasting unto the coming of the day of God, wherein the heavens being on fire shall be dissolved, and the elements shall melt with fervent heat?
That time, when men shall question the seemingly failed judgment of God [WITH FIRE], will be the same time (Last days) when God shall pour out his spirit upon the whole house of Israel.
When James says,
Jas 5:3 KJV Your gold and silver is cankered; and the rust of them shall be a witness against you, and shall eat your flesh as it were fire. Ye have heaped treasure together for the last days.
He is not saying that it is the last days, but merely that rich men behave as if it were the last days, who think only of self preservation rather than the welfare of their soul, or the lives of others.
John said similar [as THAT OF] James when he says,
1Jn 2:17-18 KJV 17 And the world passeth away, and the lust thereof: but he that doeth the will of God abideth for ever. 18 Little children, it is the last time:
and as ye have heard that antichrist shall come, even now are there many antichrists; whereby we know that it is the last time.
John isn't saying that it is the last time. Notice how the beginning of verse 18, where he says "it is the last time", is actually part of the thought that he states in verse 17 when he said that All the world will pass away and the lusts thereof... THAT is the last time. He confirms that you know that Antichrist will truly come... in the last time!... whereby we know then it will be the last time. Antichrists were there in John's days, and even in our days are here, because men lust for the things that pass away. But in THE last days, Antichrist shall truly come because:
1. Men will still be lusting for the things that will pass away, and
2. In those days, things that men continue to lust for, will in fact, pass away in those days, because it is THE LAST DAYS!
The last days, those days, will be when God will bring to nought, those things that ARE [lusted after] , BY those things which ARE NOT [NOW! ].
1Co 1:27-29 KJV 27 But God hath chosen the foolish things of the world to confound the wise; and God hath chosen the weak things of the world to confound the things which are mighty; 28 And base things of the world, and things which are despised, hath God chosen,
yea, and things which are not, to bring to nought things that are: 29 That no flesh should glory in his presence.
Be Blessed
The PuP