And here is the mind which hath wisdom. Omit "and." Read, Here is the mind (or, meaning), etc. These words (as in Revelation 13:18) draw attention to the explanation which follows—or else that which precedes (cf.
Revelation 13:18). They also make it appear that the explanation which the angel offers of the "mystery" is not one to be understood without some difficulty. The seven heads are seven mountains, on which the woman sitteth.
The diversity of opinions on the interpretation of this passage is mainly owing to the fact that writers are not consistent in their application of symbols and numbers; in one place interpreting figuratively, in another literally.
We have repeatedly seen that the language of the Apocalypse and its numbers are symbolical. The seals are not literal seals, the Lamb is not a literal Lamb, the beast is not a literal beast, etc. So here, the mountains are not literal mountains.
A mountain is a symbol of power (see on Revelation 8:8); seven is the number significant of universality (see on Revelation 1:4; Revelation 5:1, etc.). The plain meaning of the passage, therefore, is that the woman relies upon a visibly universal power.
This is precisely the idea contained in Revelation 17:3, which describes the faithless part of the Church (the harlot) trusting to the power of the world (the beast). Of course, the most prominent form of this world power in St.
John's time was heathen Rome, hence some writers believe that "the seven-hilled city," Rome, is referred to here—either pagan or papal Rome. And, indeed, this may be a partial fulfilment of the vision; but it is not the whole signification.
To understand seven mountains literally in this place renders it necessary to interpret forty-two weeks, etc., literally in another.