1046. Verse 5. And upon her forehead a name written, Mystery, Babylon the great, signifies having in heart a love of dominion over the world and heaven, which the holy things of the Word, of the church, and of worship are made to serve as means. This is evident from the signification of "a name written upon the forehead," as being what she is as to love, for "name," signifies what a thing or a state is, and "forehead" signifies love. That "name" means what a thing or a state is may be seen n. 102, 148, 676, 695, 841, 892; and that "forehead" corresponds to the good of love, n. 427, 852. Also from the signification of "mystery," as being that which lies hidden in the heart and is not evident to the common people. That this is the love of dominion over the world and over heaven, which the holy things of the church are made to serve as means, and that the cupidity and government of that love is Babylon, has been fully shown in the introduction to this chapter (n. 1029). And as that love devastates the church of all truths and goods, that devastation is also meant by "Mystery, Babylon the great."

The internal meaning of “blood” is a little tricky. In most cases, blood is linked with Divine Truth and it’s relationship with the Lord. But in some cases, especially when discussing the first half of Genesis, the Works of Swedenborg link blood to a state of caring, or love to the neighbor. No absolute explanation is offered for this, but it’s worth noting that blood takes a number of forms in the body – it sometimes carries nutrients and oxygen, sometimes waste products, and sometimes nutrients and carbon dioxide. So it’s not unreasonable for blood to have different meanings in different contexts.