Malevolent,[681] frequently, by invoking demons over boys of tender years, have made them repeat poetical compositions which were the admiration and amazement of all. Now these effects we are to suppose are brought about in the following manner: As holy and immaculate souls, after devoting themselves to God with all affection and purity, and after preserving themselves free from all contagion of evil spirits,[682] and after being purified by lengthened abstinence, and imbued with holy and religious training, assume by this means a portion of divinity, and earn the grace of prophecy, and other divine gifts; so also are we to suppose that those who place themselves in the way of the opposing powers, _i.e._ who purposely admire and adopt their manner of life and habits,[683] receive their inspiration, and become partakers of their wisdom and doctrine. And the result of this is, that they are filled with the working of those spirits to whose service they have subjected themselves. 4, With respect to those, indeed, who teach differently regarding Christ from what the rule of Scripture allows, it is no idle task to ascertain whether it is from a treacherous purpose that these opposing powers, in their struggles to prevent a belief in Christ, have devised certain fabulous and impious doctrines; or whether, on hearing the word of Christ, and not being able to cast it forth from the secrecy of their conscience, nor yet to retain it pure and holy, they have, by means of vessels that were convenient to their use,[684] and, so to speak, through their prophets, introduced various errors contrary to the rule of Christian truth. Now we are to suppose rather that apostate and refugee powers,[685] which have departed from God out of the very wickedness of their mind and will,[686] or from envy of those for whom there is prepared (on their becoming acquainted with the truth) an ascent to the same rank, whence they themselves had fallen, did, in order to prevent any progress of that kind, invent these errors and delusions of false doctrine. It is then clearly established, by many proofs, that while the soul of man exists in this body, it may admit different energies, _i.e._ operations, from a diversity of good and evil spirits. Now, of wicked spirits there is a twofold mode of operation: _i.e._ when they either take complete and entire possession of the mind,[687] so as to allow their captives[688] the power neither of understanding nor feeling; as, for instance, is the case with those commonly called possessed,[689] whom we see to be deprived of reason, and insane (such as those were who are related in the Gospel to have been cured by the Saviour); or when by their wicked suggestions they deprave a sentient and intelligent soul with thoughts of various kinds, persuading it to evil, of which Judas is an illustration, who was induced at the suggestion of the devil to commit the crime of treason,