1 Objection 1: It would seem that the soul is man. For it is written 2 Cor. 4, 16): Though our outward man is corrupted, yet the inward man is renewed day by day. But that which is within man is the soul. Therefore the soul is the inward man.
1 Ad quartum sic proceditur. Videtur quod anima sit homo. Dicitur enim II ad Cor. IV, licet is qui foris est noster homo corrumpatur, tamen is qui intus est, renovatur de die in diem. Sed id quod est intus in homine, est anima. Ergo anima est homo interior.
2 Objection 2: Further, the human soul is a substance. But it is not a universal substance. Therefore it is a particular substance. Therefore it is a hypostasis or a person; and it can only be a human person. Therefore the soul is man; for a human person is a man.
2 Praeterea, anima humana est substantia quaedam. Non autem est substantia universalis. Ergo est substantia particularis. Ergo est hypostasis vel persona. Sed non nisi humana. Ergo anima est homo, nam persona humana est homo.
3 On the contrary, Augustine De Civ. Dei xix, 3) commends Varro as holding that man is not a mere soul, nor a mere body; but both soul and body.
3 Sed contra est quod Augustinus, XIX de Civ. Dei, commendat Varronem, qui hominem nec animam solam, nec solum corpus, sed animam simul et corpus esse arbitrabatur.
4 I answer that, The assertion the soul is man, can be taken in two senses. First, that man is a soul; though this particular man, Socrates, for instance, is not a soul, but composed of soul and body. I say this, forasmuch as some held that the form alone belongs to the species; while matter is part of the individual, and not the species. This cannot be true; for to the nature of the species belongs what the definition signifies; and in natural things the definition does not signify the form only, but the form and the matter.
Hence in natural things the matter is part of the species; not, indeed, signate matter, which is the principle of individuality; but the common matter. For as it belongs to the notion of this particular man to be composed of this soul, of this flesh, and of these bones; so it belongs to the notion of man to be composed of soul, flesh, and bones; for whatever belongs in common to the substance of all the individuals contained under a given species, must belong to the substance of the species.
It may also be understood in this sense, that this soul is this man; and this could be held if it were supposed that the operation of the sensitive soul were proper to it, apart from the body; because in that case all the operations which are attributed to man would belong to the soul only; and whatever performs the operations proper to a thing, is that thing; wherefore that which performs the operations of a man is man. But it has been shown above Article 3) that sensation is not the operation of the soul only.
Since, then, sensation is an operation of man, but not proper to him, it is clear that man is not a soul only, but something composed of soul and body. Plato, through supposing that sensation was proper to the soul, could maintain man to be a soul making use of the body.
4 Respondeo dicendum quod animam esse hominem dupliciter potest intelligi. Uno modo, quod homo sit anima, sed hic homo non sit anima, sed compositum ex anima et corpore, puta Socrates. Quod ideo dico, quia quidam posuerunt solam formam esse de ratione speciei, materiam vero esse partem individui, et non speciei. Quod quidem non potest esse verum. Nam ad naturam speciei pertinet id quod significat definitio. Definitio autem in rebus naturalibus non significat formam tantum, sed formam et materiam. Unde materia est pars speciei in rebus naturalibus, non quidem materia signata, quae est principium individuationis; sed materia communis. Sicut enim de ratione huius hominis est quod sit ex hac anima et his carnibus et his ossibus; ita de ratione hominis est quod sit ex anima et carnibus et ossibus. Oportet enim de substantia speciei esse quidquid est communiter de substantia omnium individuorum sub specie contentorum. Alio vero modo potest intelligi sic, quod etiam haec anima sit hic homo. Et hoc quidem sustineri posset, si poneretur quod animae sensitivae operatio esset eius propria sine corpore, quia omnes operationes quae attribuuntur homini, convenirent soli animae; illud autem est unaquaeque res, quod operatur operationes illius rei. Unde illud est homo, quod operatur operationes hominis. Ostensum est autem quod sentire non est operatio animae tantum. Cum igitur sentire sit quaedam operatio hominis, licet non propria, manifestum est quod homo non est anima tantum, sed est aliquid compositum ex anima et corpore. Plato vero, ponens sentire esse proprium animae, ponere potuit quod homo esset anima utens corpore.
5 Reply to Objection 1: According to the Philosopher Ethic. ix, 8), a thing seems to be chiefly what is principle in it; thus what the governor of a state does, the state is said to do. In this way sometimes what is principle in man is said to be man; sometimes, indeed, the intellectual part which, in accordance with truth, is called the inward man; and sometimes the sensitive part with the body is called man in the opinion of those whose observation does not go beyond the senses. And this is called the outward man.
5 Ad primum ergo dicendum quod, secundum philosophum in IX Ethic., illud potissime videtur esse unumquodque, quod est principale in ipso, sicut quod facit rector civitatis, dicitur civitas facere. Et hoc modo aliquando quod est principale in homine, dicitur homo, aliquando quidem pars intellectiva, secundum rei veritatem, quae dicitur homo interior; aliquando vero pars sensitiva cum corpore, secundum aestimationem quorundam, qui solum circa sensibilia detinentur. Et hic dicitur homo exterior.
6 Reply to Objection 2: Not every particular substance is a hypostasis or a person, but that which has the complete nature of its species. Hence a hand, or a foot, is not called a hypostasis, or a person; nor, likewise, is the soul alone so called, since it is a part of the human species.
6 Ad secundum dicendum quod non quaelibet substantia particularis est hypostasis vel persona, sed quae habet completam naturam speciei. Unde manus vel pes non potest dici hypostasis vel persona. Et similiter nec anima, cum sit pars speciei humanae.