1 Objection 1: It would seem that enlightenment is in the demons. For enlightenment means the manifestation of the truth. But one demon can manifest truth to another, because the superior excel in natural knowledge. Therefore the superior demons can enlighten the inferior.
1 Ad tertium sic proceditur. Videtur quod in Daemonibus sit illuminatio. Illuminatio enim consistit in manifestatione veritatis. Sed unus Daemon potest alteri veritatem manifestare, quia superiores magis acumine naturalis scientiae vigent. Ergo superiores Daemones possunt inferiores illuminare.
2 Objection 2: Further, a body abounding in light can enlighten a body deficient in light, as the sun enlightens the moon. But the superior demons abound in the participation of natural light. Therefore it seems that the superior demons can enlighten the inferior.
2 Praeterea, corpus quod superabundat in lumine, potest illuminare corpus quod in lumine deficit; sicut sol lunam. Sed superiores Daemones magis abundant in participatione luminis naturalis. Ergo videtur quod superiores Daemones possunt inferiores illuminare.
3 On the contrary, Enlightenment is not without cleansing and perfecting, as stated above Question 106, Article 1). But to cleanse does not befit the demons, according to the words: What can be made clean by the unclean? Ecclus. 34, 4). Therefore neither can they enlighten.
3 Sed contra, illuminatio cum purgatione est et perfectione, ut supra dictum est. Sed purgare non convenit Daemonibus; secundum illud Eccli. XXXIV, ab immundo quid mundabitur? Ergo etiam neque illuminare.
4 I answer that, There can be no enlightenment properly speaking among the demons. For, as above explained Question 107, Article 2), enlightenment properly speaking is the manifestation of the truth in reference to God, Who enlightens every intellect. Another kind of manifestation of the truth is speech, as when one angel manifests his concept to another. Now the demon's perversity does not lead one to order another to God, but rather to lead away from the Divine order; and so one demon does not enlighten another; but one can make known his mental concept to another by way of speech.
4 Respondeo dicendum quod in Daemonibus non potest esse illuminatio proprie. Dictum est enim supra quod illuminatio proprie est manifestatio veritatis, secundum quod habet ordinem ad Deum, qui illuminat omnem intellectum. Alia autem manifestatio veritatis potest esse locutio; sicut cum unus Angelus alteri suum conceptum manifestat. Perversitas autem Daemonum hoc habet, quod unus alium non intendit ordinare ad Deum, sed magis ab ordine divino abducere. Et ideo unus Daemon alium non illuminat; sed unus alii suum conceptum per modum locutionis intimare potest.
5 Reply to Objection 1: Not every kind of manifestation of the truth is enlightenment, but only that which is above described.
5 Ad primum ergo dicendum quod non quaelibet veritatis manifestatio habet rationem illuminationis, sed solum quae dicta est.
6 Reply to Objection 2: According to what belongs to natural knowledge, there is no necessary manifestation of the truth either in the angels, or in the demons, because, as above explained Question 55, Article 2; Question 58, Article 2; Question 79, Article 2), they know from the first all that belongs to their natural knowledge. So the greater fulness of natural light in the superior demons does not prove that they can enlighten others.
6 Ad secundum dicendum quod secundum ea quae ad naturalem cognitionem pertinent, non est necessaria manifestatio veritatis neque in Angelis neque in Daemonibus, quia, sicut supra dictum est, statim a principio suae conditionis omnia cognoverunt quae ad naturalem cognitionem pertinent. Et ideo maior plenitudo naturalis luminis quae est in superioribus Daemonibus, non potest esse ratio illuminationis.