Theirs is a spiritual body, but a tangible one, such that it may be cut; the wound will close like air or water, but they will still experience pain, and so fear the edge of any sword or bladed weapon. Virgil has his Sibyl warn Aeneus:
Do thou go on thy way and draw thy sword.
In the Third Book of Occult Philosophy, Agrippa arrives at the topic of Ceremonial Magic, and our relationship with the invisible world. In particular, it is here Agrippa expands on the Kabbalah and the idea of union with the personal genius.