BOOK TENTH.

For even Porphyry promises some kind of purgation of the soul by the help of theurgy, though he does so with some hesitation and shame, and denies that this art can secure to any one a return to God; so that you can detect his opinion vacillating between the profession of philosophy and an art which he feels to be presumptuous and sacrilegious. For at one time he warns us to avoid it as deceitful, and prohibited by law, and dangerous to those who practise it; then again, as if in deference to its advocates, he declares it useful for cleansing one part of the soul, not, indeed, the intellectual part, by which the truth of things intelligible, which have no sensible images, is recognised, but the spiritual part, which takes cognizance of the images of things material. This part, he says, is prepared and fitted for intercourse with spirits and angels, and for the vision of the gods, by the help of certain theurgic consecrations, or, as they call them, mysteries. He acknowledges, however, that these theurgic mysteries impart to the intellectual soul no such purity as fits it to see its God, and recognise the things that truly exist. And from this acknowledgment we may infer what kind of gods these are, and what kind of vision of them is imparted by theurgic consecrations, if by it one cannot see the things which truly exist. He says, further, that the rational, or, as he prefers calling it, the intellectual soul, can pass into the heavens without the spiritual part being cleansed by theurgic art, and that this art cannot so purify the spiritual part as to give it entrance to immortality and eternity. And therefore, although he distinguishes angels from demons, asserting that the habitation of the latter is in the air, while the