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22 CONCERNING BEING AND ESSENCE necessarily that matter would impede intelligibility by means of its corporeal form. And this cannot be, because the very corporeal form also is intelligible in act, just as other forms are, inasmuch as it is abstracted from matter. Wherefore in the soul or in an intelligence there is in no way a composition of matter and form so that essence might be taken in them in the mode in which it is taken in corporeal substances. But there is there (in them) a composition of form and existence; whence it is said in the comment on the ninth proposition of the book De Causis 23 that intelligence is having form and existence; and form is taken there for the very quiddity or simple nature. But it is easy to see how this is. For whatever things are disposed towards (se habent ad} one another in such wise that one is the cause of the existence of the other, that which has the ratio of cause can possess existence without the other, but not conversely. But such is found to be the habitude of matter and form, because form gives existence to matter, and therefore it is impossible for matter to be without some form, yet it is not impossible for any form to exist without matter, for form inasmuch as it is form does not depend on matter. But if any forms should be discovered which cannot exist save in matter, this happens to them inasmuch as they are distant from the first principle which is the first and pure act. Whence those forms which have the greatest propinquity to the first principle are forms subsisting by virtue of themselves (per se) without matter. For form does not require matter according to its entire genus, as has been said, and forms of this sort are intelligences. And therefore it is not necessary that the essences or quiddities of these substances be anything save the very form. Therefore the essence of a composite substance and the essence of a simple * 8 Cf. Bardenhewer, "Die pscudoaristotelische Schrift tJbcr das Reinc Cute" bckannt untcr dcm Namen "Liber de Causis", Fibourg-en-Bas, i&8a, No. 8, p. 173.