Here we have the mystery of this vision explained. The apostle wonders at the sight of this woman: the angel undertakes to open this vision to him, it being the key of the former visions; and he tells the apostle what was meant by the beast on which the woman sat; but it is so explained as still to need further explanation. 1. This beast was, and is not, and yet is; that is, it was a seat of idolatry and persecution; and is not, that is, not in the ancient form, which was pagan; and yet it is, it is truly the seat of idolatry and tyranny, though of another sort and form. It ascends out of the bottomless pit (idolatry and cruelty are the issue and product of hell), and it shall return thither and go into perdition. 2. This beast has seven heads, which have a double signification. (1.) Seven mountains - the seven hills on which Rome stands; and (2.) Seven kings - seven sorts of government. Rome was governed by kings, consuls, tribunes, decemviri, dictators, emperors who were pagan, and emperors who were Christian. Five of these were extinct when this prophecy was written; one was then in being, that is, the pagan emperor; and the other, that is, the Christian emperor, was yet to come, Rev 17:10. This beast, the papacy, makes an eighth governor, and sets up idolatry again. 3. This beast had ten horns; which are said to be ten kings which have as yet received no kingdoms; as yet, that is, as some, shall not rise up till the Roman empire be broken in pieces; or, as others, shall not rise up till near the end of antichrist's reign, and so shall reign but as it were one hour with her, but shall for that time be very unanimous and very zealous in that interest, and entirely devoted to it, divesting themselves of their prerogatives and revenues (things so dear to princes), out of an unaccountable fondness for the papacy.

And the angel said unto me, Wherefore didst thou marvel! I will tell thee the mystery of the woman, and of the beast that carried her, which hath the seven heads and ten horns - The apostle was greatly astonished, as well he might be, at the woman's being drunk with the blood of the saints, when the beast which carried her abounded with sacred appellations, such as holy, most holy, most Christian, sacred, most sacred. The angel undertakes to explain to St. John the vision which had excited in him so great astonishment; and the explication is of such great importance, that, had it not been given, the mystery of the dragon and the beast could never have been satisfactorily explained in all its particulars. The angel begins with saying: -

And the angel said unto me,.... The same as in Rev 17:1

wherefore didst thou marvel? which is not said by way of reproof, as questions of this kind sometimes are, Act 3:12 for John did not wonder at her with a sinful admiration, so as to have her in great veneration, and to do homage and worship to her, as the inhabitants of the world wondered after the beast, Rev 13:3 but his admiration was an amazement, or stupefaction of mind, joined with indignation at her; and this is said by the angel to lead on to what he had to declare unto him.

I will tell thee the mystery of the woman; that is, what is mysteriously or mystically designed by her; for till it was made known to John by the angel, it was a mystery to him; and when it was revealed, the interpretation is given in such an obscure manner, that it is only understood by the mind that has spiritual wisdom; and still remains a mystery to carnal men, just as the Gospel itself does. The hidden meaning of this woman, or the mystery of her, is told by the angel in Rev 17:18.

And of the beast that carried her, which hath the seven heads, and ten horns; the mystical sense of the beast, its heads and horns, and which is also delivered in a mysterious manner, is given in Rev 17:8.

martyrs--witnesses.

I wondered with great admiration--As the Greek is the same in the verb and the noun, translate the latter "wonder." John certainly did not admire her in the modern English sense. Elsewhere (Rev 17:8; Rev 13:3), all the earthly-minded ("they that dwell on the earth") wonder in admiration of the beast. Here only is John's wonder called forth; not the beast, but the woman sunken into the harlot, the Church become a world-loving apostate, moves his sorrowful astonishment at so awful a change. That the world should be beastly is natural, but that the faithful bride should become the whore is monstrous, and excites the same amazement in him as the same awful change in Israel excited in Isaiah and Jeremiah. "Horrible thing" in them answers to "abominations" here. "Corruptio optimi pessima"; when the Church falls, she sinks lower than the godless world, in proportion as her right place is higher than the world. It is striking that in Rev 17:3, "woman" has not the article, "the woman," as if she had been before mentioned: for though identical in one sense with the woman, Rev 12:1-6, in another sense she is not. The elect are never perverted into apostates, and still remain as the true woman invisibly contained in the harlot; yet Christendom regarded as the woman has apostatized from its first faith.