Thomas Aquinas, Summa Theologiae

Objection 1: It would seem that habit is not a quality. For Augustine says (Questions. lxxxiii, qu. 73): "this word 'habit' is derived from the verb 'to have.'" But "to have" belongs not only to quality, but also to the other categories: for we speak of ourselves as "having" quantity and money and other like things. Therefore habit is not a quality.

Objection 2: Further, habit is reckoned as one of the predicaments; as may be clearly seen in the Book of the Predicaments (Categor. vi). But one predicament is not contained under another. Therefore habit is not a quality.

Objection 3: Further, "every habit is a disposition," as is stated in the Book of the Predicaments (Categor. vi). Now disposition is "the order of that which has parts," as stated in Metaph. v, text. 24. But this belongs to the predicament Position. Therefore habit is not a quality.

On the contrary, The Philosopher says in the Book of Predicaments (Categor. vi) that "habit is a quality which is difficult to change."

I answer that, This word "habitus" is derived from "habere" . Now habit is taken from this word in two ways; in one way, inasmuch as man, or any other thing, is said to "have" something; in another way, inasmuch as a particular thing has a relation either in regard to itself, or in regard to something else.

Concerning the first, we must observe that "to have," as said in regard to anything that is "had," is common to the various predicaments. And so the Philosopher puts "to have" among the "post-predicaments," so called because they result from the various predicaments; as, for instance, opposition, priority, posterity, and such like. Now among things which are had, there seems to be this distinction, that there are some in which there is no medium between the "haver" and that which is had: as, for instance, there is no medium between the subject and quality or quantity. Then there are some in which there is a medium, but only a relation: as, for instance, a man is said to have a companion or a friend. And, further, there are some in which there is a medium, not indeed an action or passion, but something after the manner of action or passion: thus, for instance, something adorns or covers, and something else is adorned or covered: wherefore the Philosopher says (Metaph. v, text. 25) that "a habit is said to be, as it were, an action or a passion of the haver and that which is had"; as is the case in those things which we have about ourselves. And therefore these constitute a special genus of things, which are comprised under the predicament of "habit": of which the Philosopher says (Metaph. v, text. 25) that "there is a habit between clothing and the man who is clothed."

But if "to have" be taken according as a thing has a relation in regard to itself or to something else; in that case habit is a quality; since this mode of having is in respect of some quality: and of this the Philosopher says (Metaph. v, text. 25) that "habit is a disposition whereby that which is disposed is disposed well or ill, and this, either in regard to itself or in regard to another: thus health is a habit." And in this sense we speak of habit now. Wherefore we must say that habit is a quality.

Reply to Objection 1: This argument takes "to have" in the general sense: for thus it is common to many predicaments, as we have said.

Reply to Objection 2: This argument takes habit in the sense in which we understand it to be a medium between the haver, and that which is had: and in this sense it is a predicament, as we have said.

Reply to Objection 3: Disposition does always, indeed, imply an order of that which has parts: but this happens in three ways, as the Philosopher goes on at once to says (Metaph. v, text. 25): namely, "either as to place, or as to power, or as to species." "In saying this," as Simplicius observes in his Commentary on the Predicaments, "he includes all dispositions: bodily dispositions, when he says 'as to place,'" and this belongs to the predicament "Position," which is the order of parts in a place: "when he says 'as to power,' he includes all those dispositions which are in course of formation and not yet arrived at perfect usefulness," such as inchoate science and virtue: "and when he says, 'as to species,' he includes perfect dispositions, which are called habits," such as perfected science and virtue.

Articulus 1

Argumentum 1

Ad primum sic proceditur. Videtur quod habitus non sit qualitas.

Dicit enim Augustinus, in libro octoginta trium quaest., quod hoc nomen habitus dictum est ab hoc verbo quod est habere.

Sed habere non solum pertinet ad qualitatem, sed ad alia genera, dicimur enim habere etiam quantitatem, et pecuniam, et alia huiusmodi. Ergo habitus non est qualitas.

Argumentum 2

Praeterea, habitus ponitur unum praedicamentum; ut patet in libro praedicamentorum. Sed unum praedicamentum non continetur sub alio. Ergo habitus non est qualitas.

Argumentum 3

Praeterea, omnis habitus est dispositio, ut dicitur in praedicamentis. Sed dispositio est ordo habentis partes, ut dicitur in V metaphys..

Hoc autem pertinet ad praedicamentum situs.

Ergo habitus non est qualitas.

Sed Contra

Sed contra est quod philosophus dicit, in praedicamentis, quod habitus est qualitas de difficili mobilis.

Corpus

Respondeo dicendum quod hoc nomen habitus ab habendo est sumptum. A quo quidem nomen habitus dupliciter derivatur, uno quidem modo, secundum quod homo, vel quaecumque alia res, dicitur aliquid habere; alio modo, secundum quod aliqua res aliquo modo se habet in seipsa vel ad aliquid aliud.

Circa primum autem, considerandum est quod habere, secundum quod dicitur respectu cuiuscumque quod habetur, commune est ad diversa genera.

Unde philosophus inter post praedicamenta habere ponit, quae scilicet diversa rerum genera consequuntur; sicut sunt opposita, et prius et posterius, et alia huiusmodi. Sed inter ea quae habentur, talis videtur esse distinctio, quod quaedam sunt in quibus nihil est medium inter habens et id quod habetur, sicut inter subiectum et qualitatem vel quantitatem nihil est medium. Quaedam vero sunt in quibus est aliquid medium inter utrumque, sed sola relatio, sicut dicitur aliquis habere socium vel amicum. Quaedam vero sunt inter quae est aliquid medium, non quidem actio vel passio, sed aliquid per modum actionis vel passionis, prout scilicet unum est ornans vel tegens, et aliud ornatum aut tectum, unde philosophus dicit, in V metaphys., quod habitus dicitur tanquam actio quaedam habentis et habiti, sicut est in illis quae circa nos habemus. Et ideo in his constituitur unum speciale genus rerum, quod dicitur praedicamentum habitus, de quo dicit philosophus, in V metaphys., quod inter habentem indumentum, et indumentum quod habetur, est habitus medius.

Si autem sumatur habere prout res aliqua dicitur quodam modo se habere in seipsa vel ad aliud; cum iste modus se habendi sit secundum aliquam qualitatem, hoc modo habitus quaedam qualitas est, de quo philosophus, in V metaphys., dicit quod habitus dicitur dispositio secundum quam bene vel male disponitur dispositum, et aut secundum se aut ad aliud, ut sanitas habitus quidam est.

Et sic loquimur nunc de habitu.

Unde dicendum est quod habitus est qualitas.

Ad 1

Ad primum ergo dicendum quod obiectio illa procedit de habere communiter sumpto, sic enim est commune ad multa genera, ut dictum est.

Ad 2

Ad secundum dicendum quod ratio illa procedit de habitu secundum quod intelligitur aliquid medium inter habens et id quod habetur, sic enim est quoddam praedicamentum,

Ad 3

Ad tertium dicendum quod dispositio quidem semper importat ordinem alicuius habentis partes, sed hoc contingit tripliciter, ut statim ibidem philosophus subdit, scilicet aut secundum locum, aut secundum potentiam, aut secundum speciem. In quo, ut simplicius dicit in commento praedicamentorum, comprehendit omnes dispositiones. Corporales quidem, in eo quod dicit secundum locum, et hoc pertinet ad praedicamentum situs, qui est ordo partium in loco. Quod autem dicit secundum potentiam, includit illas dispositiones quae sunt in praeparatione et idoneitate nondum perfecte, sicut scientia et virtus inchoata. Quod autem dicit secundum speciem, includit perfectas dispositiones, quae dicuntur habitus, sicut scientia et virtus complete.