XIV. Canons concerning fallen angels
XIV. Canons are to be noted concerning them. First, the Devil was evil from the beginning not of creation but of defection (Augustine; Thomas; Zanchi). Second, the impious are children of the Devil not with respect to their substance but in view of the accident of malice. Third, the Devil is the first author and fountain of sin — of malice both in his own nature and in the human race (John 8:44; 1 John 3:8). Fourth, fallen angels retained their substance with intellect and will, and great power besides, but by all these they are borne only to evil. Fifth, the Devil abuses intellect, will, power, and all his forces not only to propagate his malice but also to root out Gods kingdom.
Sixth, the Devil does not know human thoughts except through outward signs and probably, or impure ones that he himself suggests. Seventh, Satans power is great, but under Gods omnipotence. Eighth, the Devil can do wonders, but not true and properly so-called miracles. Ninth, the Devil does what he can when God permits; what he can, he does not do when God forbids. Tenth, no human being by his own powers can drive back the Devil and resist him; it is Gods grace and power alone to overcome him and to free the repentant and believing human being from his snares.
Latin
XIV. Sunt autem de iis notandi canones. 1. Diabolus malus fuit ab initio non creationis, sed defectionis (Augustinus; Thomas; Zanchius). 2. Impii sunt filii Diaboli non respectu substantiae suae, sed intuitu accidentis malitiae. 3. Diabolus primus author est et fons peccati, malitiae tum in sua ipsius natura tum in genere humano (Ioh. 8:44; 1 Ioh. 3:8). 4. Angeli lapsi retinuerunt quidem substantiam suam cum intellectu et voluntate, magnaque insuper potentia, sed omnibus istis duntaxat ad malum feruntur. 5. Diabolus intellectu, voluntate, potentia viribusque suis omnibus abutitur non solum ad malitiam suam propagandam, sed et regnum Dei exstirpandum. 6. Diabolus hominum cogitationes non callet nisi per externa signa et probabiliter, aut impuras quas ipse suggerit. 7. Magna Satanae potentia est, sed sub Dei omnipotentia. 8. Diabolus facere potest mirabilia, non autem vera et proprie dicta miracula. 9. Diabolus facit quod potest, Deo permittente; quod potest, non facit, Deo prohibente. 10. Nemo homo suis viribus Diabolum repellere eique resistere potest; sed Dei solius gratia et potentia est eum superare, et a laqueis ipsius hominem resipiscentem et credentem explicare.