The Parable of the Swept House and the Unclean Spirits (and Application to the Beast)
The Creation Days and the Beast Heads as Image of Whole Salvation History
In the Gospel parable of the unclean spirit who inhabits a house, the spirit is cast out and the house swept; then later, the spirit returns with seven others that are even worse and the house is worse than when it started.
*Matthew 12: 43
And when an unclean spirit is gone out of a man he walketh through dry places seeking rest, and findeth none.  Then he saith: I will return into my house from whence I came out. And coming he findeth it empty, swept, and garnished.  Then he goeth, and taketh with him seven other spirits more wicked than himself, and they enter in and dwell there: and the last state of that man is made worse than the first. So shall it be also to this wicked generation.*
It may not seem like it, but there are profound parallels between this parable and the discourse on the seven-headed beast of apocalypse. Sound crazy? Come along and see! First, we need to revisit the theology of the greater ages of sin and of the beast as representation of those greater ages of darkness in human history.
Let us look at the text in question of Apocalypse:
The beast, which thou sawest, was, and is not, and shall come up out of the bottomless pit, and go into destruction  And here is the understanding that hath wisdom. The seven heads … are seven kings:  Five are fallen, one is, and the other is not yet come: and when he is come, he must remain a short time. And the beast which was, and is not: the same also is the eighth, and is of the seven, and goeth into destruction.*
How, would this relate to our parable? Well, the parallels are astounding. Just come along! In short, BOTH SCRIPTURES can be seen as a profound image of the fall when we see the beast and the unclean spirits as the fallen nature itself manifested throughout human history, from beginning to end, inclusive!
The Beast “Was”:
In the beginning, before the Flood, the fall ruled the house of the world. No substantial redemptive action had, as of yet, been wrought by God. Hence, the fall was the prevailing force in human history at that time. The beast was!
**The Beast “is Not”:
But with the Flood, the world was cleansed of all wickedness, and the house was swept clean. The fall ceased to be the prevailing force of human history because God was beginning to RENEW man, to REcreate Him in His image and likeness. Hence, although greater subsequent phases of sin would still arise after the Flood, they are SECONDARY manifestations of the Fall (with the exception of the very last one, see below) because they are still in the process of being renewed at the progressive phases. Only at the end, when a supreme culpability and wickedness comes—one that, within human history, practically cannot be cured–namely, the great apostasy and Antichrist, will the fall be back to stay and, therefore, the prevailing force of human history again, as just before the Flood.
Seven Additional Spirits
Hence, as just mentioned, after the Flood, the fall would then go on to re-exert itself in SEVEN ADDITIONAL PUNCTUATED MANIFESTATIONS in human history. We are now, by all estimates, in the seventh overall, leaving only the eighth to come at the very end, the Great Apostasy and Antichrist.
I. The Fall and Noah’s Day
IV. Intermediate Pre-exile Jewish Apostasy
VI. Pagan Rome
VII. OUR CURRENT AGE, the Minor Apostasy
VIII. The Great Apostasy [yet future, to follow Our Lady’s Age of Peace where Her Heart Triumphs temporarily in human history]
The Unclean Spirits Get Worse, the Ages of Sin, More Culpable
Further, as we remember Jesus saying that the seven additional spirits “are even worse [than the first]” each successive “spirit of the fall”, or king of the beast, in our ages IS worse than all others! Why? BECAUSE OF THE CULPABILITY of the ones that embrace the darkness, as to make humanity falling farther and farther down to the ultimate sin at the end, the great apostasy.