(1) That, however, which is the greatest thing is this, that he who [appears to] draw down a certain divinity, sees a spirit descending and entering into some one, recognizes its magnitude and quality, and is also mystically persuaded and governed by it. But a species of fire is seen by the recipient, prior to the spirit being received, which sometimes becomes manifest to all the spectators, either when the divinity is descending, or when he is departing. And from this spectacle the greatest truth and power of the God, and especially the order he possesses, as likewise about what particulars he is adapted to speak the truth, what the power is which he imparts, and what he is able to effect, become known to the scientific. Those, however, who, without these blessed spectacles, draw down spirits invisibly, are without vision, as if they were in the dark, and know nothing of what they do, except some small signs which become visible through the body of him who is divinely inspired, and certain other things which are manifestly seen, but they are ignorant of all the most important particulars of divine inspiration, which are concealed from them in the invisible.

(3) I have, however, been thus prolix, in order that you may not think all the authority of the energy in theurgic operations is in our power, and that you may not suppose the true work of them consists in our conceptions, or the falsehood of them in our deception. For though we may know the peculiarities which are consequent to each genus, yet we may not obtain the truth which is in their works. Nevertheless, efficacious union [with divine natures] is not effected without knowledge; yet knowledge does not possess a sameness with this union. So that neither is divine purity obtained through right knowledge, as neither is purity of body procured through health; but divine purity is more undefiled than knowledge, and is more transcendently united. Hence neither this, nor any thing of the like kind which is in us, and is human, cooperates any thing to the end of divine actions.

(3) For if the works which take place from the appearance of these powers are such as you say, viz. if they are arrogant and false, yet the operations about fire of true spirits are genuine and true. For, as in all other things, such as are principal primarily begin from themselves, and impart to themselves that which they give to others; as, for instance, in essence, in life, and in motion; thus also the natures which supply all beings with truth, primarily proclaim the truth of themselves, and precedaneously unfold the essence of themselves to the spectators. Hence, likewise, they exhibit to theurgists a fire which is of itself visible. For it is not the province of heat to refrigerate, nor of light to darken or conceal any thing; nor with any other nature which essentially performs a certain thing, is a power present of at the same time effecting the contrary. But things which do not possess a [true] nature, and which are contrary to things that exist essentially; these are able to receive contraries, and are adapted to fall into evil.

(3) If, also, the power of the Gods proceeds in premanifestation as far as to things inanimate, such as pebble stones, rods, pieces of wood, stones, corn, or wheat, this very thing is most admirable in the presignification of divine prophesy; because it imparts soul to things inanimate, motion to things immoveable, and makes all things to be clear and known, to partake of reason, and to be defined by the measures of intellection, though possessing no portion of reason from themselves. Another divine miracle also divinity appears to me to exhibit through signs in these things. For, as he sometimes makes some stupid man to speak wisely, through which it becomes manifest to every one, that this is not a certain human but a divine work; thus, also, he reveals through things which are deprived of knowledge, conceptions which precede all knowledge. And, at the same time, he declares to men that the signs which are exhibited are worthy of belief, and that they are superior to nature, from which he is exempt. Thus he makes things to be known which are naturally unknown, and things which are without knowledge gnostic.