Acts 2:19-21

19. And I will show wonders We must first see what is meant by this great day of the Lord. Some do expound it of the former coming of Christ in the flesh; and others refer it unto the last day of the resurrection, I do allow neither opinion. For, in my judgment, the prophet comprehendeth the whole kingdom of Christ. And so he calleth it the great day, after that the Son of God began to be revealed in the flesh, that he may lead us into the fulfilling of his kingdom. Therefore, he appointeth no certain day, but he beginneth this day at the first preaching of the gospel, and he extendeth the same unto the last resurrection. Those which restrain it unto the time of the apostles are moved with this reason, because the prophet joineth this member and that which goeth next before together. But in that there is no absurdity at all, because the prophet doth assign the time when these things began to come to pass, howsoever they have a continual going forward even until the end of the world. Furthermore, whereas he saith that the sun shall be turned to darkness, and the moon into blood, they are figurative speeches, whereby he doth give us to understand thus much, that the Lord will show tokens of his wrath through the whole frame of the world, which shall bring men even to their wit’s end, as if there should be some horrible and fearful change of nature wrought. For as the sun and moon are unto us witnesses of God’s fatherly favor towards us, whilst that by course they give light to the earth; so, on the other side, the prophet saith, that they shall be messengers to foreshow God’s wrath and displeasure. And this is the second member of the prophecy. For after that he had intreated of the spiritual grace which should be abundantly poured out upon all flesh, lest any man should imagine that all things should be quiet and prosperous together, therewithal he addeth that the estate of the world shall be troublesome, and full of great fear under Christ; as Christ himself doth more fully declare, Matthew 24 and Luke 21.

But this serveth greatly to the setting forth of grace, that whereas all things do threaten destruction, yet whosoever doth call upon the name of the Lord is sure to be saved. By the darkness of the sun, by the bloody streaming of the moon, by the black vapor of smoke, the prophet meant to declare, that whithersoever men turn their eyes, there shall many things appear, both upward and downward, which may make them amazed and afraid, as he hath already said. Therefore, this is as much as if he should have said, that the world was never in a more miserable case, that there were never so many and such cruel tokens of God’s wrath. Hence may we gather how inestimable the goodness of God is, who offereth a present remedy for so great evils; and again, how unthankful they are towards God, and how froward, which do not flee unto the sanctuary of salvation, which is nigh unto them, and doth meet them. Again, it is out of all doubt, that God meaneth by this so doleful a description, to stir up all godly men, that they may with a more fervent desire seek for salvation. And Peter citeth it to the same end, that the Jews may know that they shall be more miserable unless they receive that grace of the Spirit which is offered unto them. Yet here may a question be asked, how this can hang together, that when Christ is revealed, there should such a sea of miseries overflow and break out therewithal? For it may seem to be a thing very inconvenient, that he should be the only pledge of God’s love toward mankind, in whom the heavenly Father doth lay open all the treasure of his goodness, yea, he poureth out the bowels of his mercy upon us, and that yet, by the coming of the same, his Son, his wrath should be more hot than it was wont, so that it should, as it were, quite consume both heaven and earth at once.