Reply to Objection 3: Every power that is divided in itself is weakened. Consequently if a man being already angry with one, becomes angry with another, by this very fact his anger with the former is weakened. Especially is this so if his anger in the second case be greater: because the wrong done which aroused his former anger, will, in comparison with the second wrong, which is reckoned greater, seem to be of little or no account.
Whether anger above all hinders the use of reason?
Objection 1: It would seem that anger does not hinder the use of reason. Because that which presupposes an act of reason, does not seem to hinder the use of reason. But "anger listens to reason," as stated in Ethic. vii, 6. Therefore anger does not hinder reason.
Objection 2: Further, the more the reason is hindered, the less does a man show his thoughts. But the Philosopher says (Ethic. vii, 6) that "an angry man is not cunning but is open." Therefore anger does not seem to hinder the use of reason, as desire does; for desire is cunning, as he also states (Ethic. vii, 6.).
Objection 3: Further, the judgment of reason becomes more evident by juxtaposition of the contrary: because contraries stand out more clearly when placed beside one another. But this also increases anger: for the Philosopher says (Rhet. ii, 2) that "men are more angry if they receive unwonted treatment; for instance, honorable men, if they be dishonored": and so forth. Therefore the same cause increases anger, and facilitates the judgment of reason. Therefore anger does not hinder the judgment of reason.
On the contrary, Gregory says (Moral. v, 30) that anger "withdraws the light of understanding, while by agitating it troubles the mind."
I answer that, Although the mind or reason makes no use of a bodily organ in its proper act, yet, since it needs certain sensitive powers for the execution of its act, the acts of which powers are hindered when the body is disturbed, it follows of necessity that any disturbance in the body hinders even the judgment of reason; as is clear in the case of drunkenness or sleep. Now it has been stated (A[2]) that anger, above all, causes a bodily disturbance in the region of the heart, so much as to effect even the outward members. Consequently, of all the passions, anger is the most manifest obstacle to the judgment of reason, according to Ps. 30:10 : "My eye is troubled with wrath."
Reply to Objection 1: The beginning of anger is in the reason, as regards the appetitive movement, which is the formal element of anger. But the passion of anger forestalls the perfect judgment of reason, as though it listened but imperfectly to reason, on account of the commotion of the heat urging to instant action, which commotion is the material element of anger. In this respect it hinders the judgment of reason.
Reply to Objection 2: An angry man is said to be open, not because it is clear to him what he ought to do, but because he acts openly, without thought of hiding himself. This is due partly to the reason being hindered, so as not to discern what should be hidden and what done openly, nor to devise the means of hiding; and partly to the dilatation of the heart which pertains to magnanimity which is an effect of anger: wherefore the Philosopher says of the magnanimous man (Ethic. iv, 3) that "he is open in his hatreds and his friendships . . . and speaks and acts openly." Desire, on the other hand, is said to lie low and to be cunning, because, in many cases, the pleasurable things that are desired, savor of shame and voluptuousness, wherein man wishes not to be seen. But in those things that savor of manliness and excellence, such as matters of vengeance, man seeks to be in the open.
Reply to Objection 3: As stated above (ad 1), the movement of anger begins in the reason, wherefore the juxtaposition of one contrary with another facilitates the judgment of reason, on the same grounds as it increases anger. For when a man who is possessed of honor or wealth, suffers a loss therein, the loss seems all the greater, both on account of the contrast, and because it was unforeseen. Consequently it causes greater grief: just as a great good, through being received unexpectedly, causes greater delight. And in proportion to the increase of the grief that precedes, anger is increased also.
Whether anger above all causes taciturnity?
Objection 1: It would seem that anger does not cause taciturnity. Because taciturnity is opposed to speech. But increase in anger conduces to speech; as is evident from the degrees of anger laid down by Our Lord ( Mat. 5:22 ): where He says: "Whosoever is angry with his brother"; and " . . . whosoever shall say to his brother, 'Raca'"; and " . . . whosoever shall say to his brother, 'Thou fool.'" Therefore anger does not cause taciturnity.
Objection 2: Further, through failing to obey reason, man sometimes breaks out into unbecoming words: hence it is written ( Prov. 25:28 ): "As a city that lieth open and is not compassed with walls, so is a man that cannot refrain his own spirit in speaking." But anger, above all, hinders the judgment of reason, as stated above (A[3]). Consequently above all it makes one break out into unbecoming words. Therefore it does not cause taciturnity.
Objection 3: Further, it is written ( Mat. 12:34 ): "Out of the abundance of the heart the mouth speaketh." But anger, above all, causes a disturbance in the heart, as stated above (A[2]). Therefore above all it conduces to speech. Therefore it does not cause taciturnity.
On the contrary, Gregory says (Moral. v, 30) that "when anger does not vent itself outwardly by the lips, inwardly it burns the more fiercely."
I answer that, As stated above (A[3]; Q[46], A[4]), anger both follows an act of reason, and hinders the reason: and in both respects it may cause taciturnity. On the part of the reason, when the judgment of reason prevails so far, that although it does not curb the appetite in its inordinate desire for vengeance, yet it curbs the tongue from unbridled speech. Wherefore Gregory says (Moral. v, 30): "Sometimes when the mind is disturbed, anger, as if in judgment, commands silence." On the part of the impediment to reason because, as stated above (A[2]), the disturbance of anger reaches to the outward members, and chiefly to those members which reflect more distinctly the emotions of the heart, such as the eyes, face and tongue; wherefore, as observed above (A[2]), "the tongue stammers, the countenance takes fire, the eyes grow fierce." Consequently anger may cause such a disturbance, that the tongue is altogether deprived of speech; and taciturnity is the result.
Reply to Objection 1: Anger sometimes goes so far as to hinder the reason from curbing the tongue: but sometimes it goes yet farther, so as to paralyze the tongue and other outward members.
And this suffices for the Reply to the Second Objection.
Reply to Objection 3: The disturbance of the heart may sometimes superabound to the extend that the movements of the outward members are hindered by the inordinate movement of the heart. Thence ensue taciturnity and immobility of the outward members; and sometimes even death. If, however, the disturbance be not so great, then "out of the abundance of the heart" thus disturbed, the mouth proceeds to speak.