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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.
We must say the same thing, therefore, concerning phantasms. For if these are not true, but other things are so which have a real existence, thus also in the appearances of spirits, they seem to be such as things which are true beings; at the same time they participate of falsehood and deception, in the same manner as the forms which present themselves to the view in mirrors; and thus vainly attract the mind about things which never take place in any of the more excellent genera. These phantasms, likewise, will consist in deceptive perversions. For that which is an imitation of [real] being, and is an obscure assimilation, and becomes the cause of deception, pertains to no one of the true and clearly existing genera. But the Gods, indeed, and those powers that follow the
