Summa Theologica Part II (Pars Prima Secundae) Part 78

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Obj. 2: Further, all bodily dispositions are easy to change. But habit is a quality, difficult to change. Therefore no bodily disposition can be a habit.

Obj. 3: Further, all bodily dispositions are subject to change. But change can only be in the third species of quality, which is divided against habit. Therefore there is no habit in the body.

_On the contrary,_ The Philosopher says in the _Book of Predicaments_ (De Categor. vi) that health of the body and incurable disease are called habits.

_I answer that,_ As we have said above (Q. 49, AA. 2 seqq.), habit is a disposition of a subject which is in a state of potentiality either to form or to operation. Therefore in so far as habit implies disposition to operation, no habit is princ.i.p.ally in the body as its subject. For every operation of the body proceeds either from a natural quality of the body or from the soul moving the body.

Consequently, as to those operations which proceed from its nature, the body is not disposed by a habit: because the natural forces are determined to one mode of operation; and we have already said (Q. 49, A. 4) that it is when the subject is in potentiality to many things that a habitual disposition is required. As to the operations which proceed from the soul through the body, they belong princ.i.p.ally to the soul, and secondarily to the body. Now habits are in proportion to their operations: whence "by like acts like habits are formed"

(Ethic. ii, 1, 2). And therefore the dispositions to such operations are princ.i.p.ally in the soul. But they can be secondarily in the body: to wit, in so far as the body is disposed and enabled with prompt.i.tude to help in the operations of the soul.

If, however, we speak of the disposition of the subject to form, thus a habitual disposition can be in the body, which is related to the soul as a subject is to its form. And in this way health and beauty and such like are called habitual dispositions. Yet they have not the nature of habit perfectly: because their causes, of their very nature, are easily changeable.

On the other hand, as Simplicius reports in his _Commentary on the Predicaments,_ Alexander denied absolutely that habits or dispositions of the first species are in the body: and held that the first species of quality belonged to the soul alone. And he held that Aristotle mentions health and sickness in the _Book on the Predicaments_ not as though they belonged to the first species of quality, but by way of example: so that he would mean that just as health and sickness may be easy or difficult to change, so also are all the qualities of the first species, which are called habits and dispositions. But this is clearly contrary to the intention of Aristotle: both because he speaks in the same way of health and sickness as examples, as of virtue and science; and because in _Phys._ vii, text. 17, he expressly mentions beauty and health among habits.

Reply Obj. 1: This objection runs in the sense of habit as a disposition to operation, and of those actions of the body which are from nature: but not in the sense of those actions which proceed from the soul, and the principle of which is the will.

Reply Obj. 2: Bodily dispositions are not simply difficult to change on account of the changeableness of their bodily causes. But they may be difficult to change by comparison to such a subject, because, to wit, as long as such a subject endures, they cannot be removed; or because they are difficult to change, by comparison to other dispositions. But qualities of the soul are simply difficult to change, on account of the unchangeableness of the subject. And therefore he does not say that health which is difficult to change is a habit simply: but that it is "as a habit," as we read in the Greek [*_isos hexin_ (Categor. viii)]. On the other hand, the qualities of the soul are called habits simply.

Reply Obj. 3: Bodily dispositions which are in the first species of quality, as some maintained, differ from qualities of the third species, in this, that the qualities of the third species consist in some "becoming" and movement, as it were, wherefore they are called pa.s.sions or pa.s.sible qualities. But when they have attained to perfection (specific perfection, so to speak), they have then pa.s.sed into the first species of quality. But Simplicius in his _Commentary_ disapproves of this; for in this way heating would be in the third species, and heat in the first species of quality; whereas Aristotle puts heat in the third.

Wherefore Porphyrius, as Simplicius reports (Commentary), says that pa.s.sion or pa.s.sion-like quality, disposition and habit, differ in bodies by way of intensity and remissness. For when a thing receives heat in this only that it is being heated, and not so as to be able to give heat, then we have pa.s.sion, if it is transitory; or pa.s.sion-like quality if it is permanent. But when it has been brought to the point that it is able to heat something else, then it is a disposition; and if it goes so far as to be firmly fixed and to become difficult to change, then it will be a habit: so that disposition would be a certain intensity of pa.s.sion or pa.s.sion-like quality, and habit an intensity or disposition. But Simplicius disapproves of this, for such intensity and remissness do not imply diversity on the part of the form itself, but on the part of the diverse partic.i.p.ation thereof by the subject; so that there would be no diversity among the species of quality. And therefore we must say otherwise that, as was explained above (Q. 49, A. 2, ad 1), the adjustment of the pa.s.sion-like qualities themselves, according to their suitability to nature, implies the notion of disposition: and so, when a change takes place in these same pa.s.sion-like qualities, which are heat and cold, moisture and dryness, there results a change as to sickness and health. But change does not occur in regard to like habits and dispositions, primarily and of themselves.

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SECOND ARTICLE [I-II, Q. 50, art. 2]

Whether the Soul Is the Subject of Habit in Respect of Its Essence or in Respect of Its Power?

Objection 1: It would seem that habit is in the soul in respect of its essence rather than in respect of its powers. For we speak of dispositions and habits in relation to nature, as stated above (Q.

49, A. 2). But nature regards the essence of the soul rather than the powers; because it is in respect of its essence that the soul is the nature of such a body and the form thereof. Therefore habits are in the soul in respect of its essence and not in respect of its powers.

Obj. 2: Further, accident is not the subject of accident. Now habit is an accident. But the powers of the soul are in the genus of accident, as we have said in the First Part (Q. 77, A. 1, ad 5).

Therefore habit is not in the soul in respect of its powers.

Obj. 3: Further, the subject is prior to that which is in the subject. But since habit belongs to the first species of quality, it is prior to power, which belongs to the second species. Therefore habit is not in a power of the soul as its subject.

_On the contrary,_ The Philosopher (Ethic. i, 13) puts various habits in the various powers of the soul.

_I answer that,_ As we have said above (Q. 49, AA. 2, 3), habit implies a certain disposition in relation to nature or to operation.

If therefore we take habit as having a relation to nature, it cannot be in the soul--that is, if we speak of human nature: for the soul itself is the form completing the human nature; so that, regarded in this way, habit or disposition is rather to be found in the body by reason of its relation to the soul, than in the soul by reason of its relation to the body. But if we speak of a higher nature, of which man may become a partaker, according to 2 Pet. 1, "that we may be partakers of the Divine Nature": thus nothing hinders some habit, namely, grace, from being in the soul in respect of its essence, as we shall state later on (Q. 110, A. 4).

On the other hand, if we take habit in its relation to operation, it is chiefly thus that habits are found in the soul: in so far as the soul is not determined to one operation, but is indifferent to many, which is a condition for a habit, as we have said above (Q. 49, A.

4). And since the soul is the principle of operation through its powers, therefore, regarded in this sense, habits are in the soul in respect of its powers.

Reply Obj. 1: The essence of the soul belongs to human nature, not as a subject requiring to be disposed to something further, but as a form and nature to which someone is disposed.

Reply Obj. 2: Accident is not of itself the subject of accident. But since among accidents themselves there is a certain order, the subject, according as it is under one accident, is conceived as the subject of a further accident. In this way we say that one accident is the subject of another; as superficies is the subject of color, in which sense power is the subject of habit.

Reply Obj. 3: Habit takes precedence of power, according as it implies a disposition to nature: whereas power always implies a relation to operation, which is posterior, since nature is the principle of operation. But the habit whose subject is a power, does not imply relation to nature, but to operation. Wherefore it is posterior to power. Or, we may say that habit takes precedence of power, as the complete takes precedence of the incomplete, and as act takes precedence of potentiality. For act is naturally prior to potentiality, though potentiality is prior in order of generation and time, as stated in _Metaph._ vii, text. 17; ix, text. 13.

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THIRD ARTICLE [I-II, Q. 50, Art. 3]

Whether There Can Be Any Habits in the Powers of the Sensitive Part?

Objection 1: It would seem that there cannot be any habits in the powers of the sensitive part. For as the nutritive power is an irrational part, so is the sensitive power. But there can be no habits in the powers of the nutritive part. Therefore we ought not to put any habit in the powers of the sensitive part.

Obj. 2: Further, the sensitive parts are common to us and the brutes.

But there are not any habits in brutes: for in them there is no will, which is put in the definition of habit, as we have said above (Q.

49, A. 3). Therefore there are no habits in the sensitive powers.

Obj. 3: Further, the habits of the soul are sciences and virtues: and just as science is related to the apprehensive power, so it virtue related to the appet.i.tive power. But in the sensitive powers there are no sciences: since science is of universals, which the sensitive powers cannot apprehend. Therefore, neither can there be habits of virtue in the sensitive part.

_On the contrary,_ The Philosopher says (Ethic. iii, 10) that "some virtues," namely, temperance and fort.i.tude, "belong to the irrational part."

_I answer that,_ The sensitive powers can be considered in two ways: first, according as they act from natural instinct: secondly, according as they act at the command of reason. According as they act from natural instinct, they are ordained to one thing, even as nature is; but according as they act at the command of reason, they can be ordained to various things. And thus there can be habits in them, by which they are well or ill disposed in regard to something.

Reply Obj. 1: The powers of the nutritive part have not an inborn apt.i.tude to obey the command of reason, and therefore there are no habits in them. But the sensitive powers have an inborn apt.i.tude to obey the command of reason; and therefore habits can be in them: for in so far as they obey reason, in a certain sense they are said to be rational, as stated in _Ethic._ i, 13.

Reply Obj. 2: The sensitive powers of dumb animals do not act at the command of reason; but if they are left to themselves, such animals act from natural instinct: and so in them there are no habits ordained to operations. There are in them, however, certain dispositions in relation to nature, as health and beauty. But whereas by man's reason brutes are disposed by a sort of custom to do things in this or that way, so in this sense, to a certain extent, we can admit the existence of habits in dumb animals: wherefore Augustine says (QQ. lx.x.xiii, qu. 36): "We find the most untamed beasts, deterred by fear of pain, from that wherein they took the keenest pleasure; and when this has become a custom in them, we say that they are tame and gentle." But the habit is incomplete, as to the use of the will, for they have not that power of using or of refraining, which seems to belong to the notion of habit: and therefore, properly speaking, there can be no habits in them.

Reply Obj. 3: The sensitive appet.i.te has an inborn apt.i.tude to be moved by the rational appet.i.te, as stated in _De Anima_ iii, text.

57: but the rational powers of apprehension have an inborn apt.i.tude to receive from the sensitive powers. And therefore it is more suitable that habits should be in the powers of sensitive appet.i.te than in the powers of sensitive apprehension, since in the powers of sensitive appet.i.te habits do not exist except according as they act at the command of the reason. And yet even in the interior powers of sensitive apprehension, we may admit of certain habits whereby man has a facility of memory, thought or imagination: wherefore also the Philosopher says (De Memor. et Remin. ii) that "custom conduces much to a good memory": the reason of which is that these powers also are moved to act at the command of the reason.

On the other hand the exterior apprehensive powers, as sight, hearing and the like, are not susceptible of habits, but are ordained to their fixed acts, according to the disposition of their nature, just as the members of the body, for there are no habits in them, but rather in the powers which command their movements.

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FOURTH ARTICLE [I-II, Q. 50, Art. 4]

Whether There Is Any Habit in the Intellect?

Objection 1: It would seem that there are no habits in the intellect.

For habits are in conformity with operations, as stated above (A. 1).

But the operations of man are common to soul and body, as stated in _De Anima_ i, text. 64. Therefore also are habits. But the intellect is not an act of the body (De Anima iii, text. 6). Therefore the intellect is not the subject of a habit.

Obj. 2: Further, whatever is in a thing, is there according to the mode of that in which it is. But that which is form without matter, is act only: whereas what is composed of form and matter, has potentiality and act at the same time. Therefore nothing at the same time potential and actual can be in that which is form only, but only in that which is composed of matter and form. Now the intellect is form without matter. Therefore habit, which has potentiality at the same time as act, being a sort of medium between the two, cannot be in the intellect; but only in the _conjunction,_ which is composed of soul and body.

Obj. 3: Further, habit is a disposition whereby we are well or ill disposed in regard to something, as is said (Metaph. v, text. 25).

But that anyone should be well or ill disposed to an act of the intellect is due to some disposition of the body: wherefore also it is stated (De Anima ii, text. 94) that "we observe men with soft flesh to be quick witted." Therefore the habits of knowledge are not in the intellect, which is separate, but in some power which is the act of some part of the body.

_On the contrary,_ The Philosopher (Ethic. vi, 2, 3, 10) puts science, wisdom and understanding, which is the habit of first principles, in the intellective part of the soul.

_I answer that,_ concerning intellective habits there have been various opinions. Some, supposing that there was only one _possible_ [*See First Part, Q. 79, A. 2, ad 2] intellect for all men, were bound to hold that habits of knowledge are not in the intellect itself, but in the interior sensitive powers. For it is manifest that men differ in habits; and so it was impossible to put the habits of knowledge directly in that, which, being only one, would be common to all men. Wherefore if there were but one single "possible" intellect of all men, the habits of science, in which men differ from one another, could not be in the "possible" intellect as their subject, but would be in the interior sensitive powers, which differ in various men.

Now, in the first place, this supposition is contrary to the mind of Aristotle. For it is manifest that the sensitive powers are rational, not by their essence, but only by partic.i.p.ation (Ethic. i, 13). Now the Philosopher puts the intellectual virtues, which are wisdom, science and understanding, in that which is rational by its essence.

Wherefore they are not in the sensitive powers, but in the intellect itself. Moreover he says expressly (De Anima iii, text. 8, 18) that when the "possible" intellect "is thus identified with each thing,"

that is, when it is reduced to act in respect of singulars by the intelligible species, "then it is said to be in act, as the knower is said to be in act; and this happens when the intellect can act of itself," i.e. by considering: "and even then it is in potentiality in a sense; but not in the same way as before learning and discovering."

Therefore the "possible" intellect itself is the subject of the habit of science, by which the intellect, even though it be not actually considering, is able to consider. In the second place, this supposition is contrary to the truth. For as to whom belongs the operation, belongs also the power to operate, belongs also the habit.

But to understand and to consider is the proper act of the intellect.

Therefore also the habit whereby one considers is properly in the intellect itself.

Summa Theologica Part II (Pars Prima Secundae) Part 78

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