reckoned among the capital vices.

_On the contrary,_ Gregory (Moral. xxxi, 45) places anger among the
capital vices.

_I answer that,_ As stated above (I-II, Q. 84, A. 3, 4), a capital
vice is defined as one from which many vices arise. Now there are two
reasons for which many vices can arise from anger. The first is on
the part of its object which has much of the aspect of desirability,
in so far as revenge is desired under the aspect of just or honest*,
which is attractive by its excellence, as stated above (A. 4).
[*Honesty must be taken here in its broad sense as synonymous with
moral goodness, from the point of view of decorum; Cf. Q. 145, A. 1.]
The second is on the part of its impetuosity, whereby it precipitates
the mind into all kinds of inordinate action. Therefore it is evident
that anger is a capital vice.

Reply Obj. 1: The sorrow whence anger arises is not, for the most
part, the vice of sloth, but the passion of sorrow, which results
from an injury inflicted.

Reply Obj. 2: As stated above (Q. 118, A. 7; Q. 148, A. 5; Q. 153, A.
4; I-II, Q. 84, A. 4), it belongs to the notion of a capital vice to
have a most desirable end, so that many sins are committed through
the desire thereof. Now anger, which desires evil under the aspect of
good, has a more desirable end than hatred has, since the latter
desires evil under the aspect of evil: wherefore anger is more a
capital vice than hatred is.

Reply Obj. 3: Anger is stated to be the door to the vices
accidentally, that is by removing obstacles, to wit by hindering the
judgment of reason, whereby man is withdrawn from evil. It is,
however, directly the cause of certain special sins, which are called
its daughters.
_______________________

SEVENTH ARTICLE [II-II, Q. 158, Art. 7]

Whether Six Daughters Are Fittingly Assigned to Anger?

Objection 1: It would seem that six daughters are unfittingly
assigned to anger, namely "quarreling, swelling of the mind,
contumely, clamor, indignation and blasphemy." For blasphemy is
reckoned by Isidore [*QQ. in Deut., qu. xvi] to be a daughter of
pride. Therefore it should not be accounted a daughter of anger.

Obj. 2: Further, hatred is born of anger, as Augustine says in his
rule (Ep. ccxi). Therefore it should be placed among the daughters of
anger.

Obj. 3: Further, "a swollen mind" would seem to be the same as pride.
Now pride is not the daughter of a vice, but "the mother of all
vices," as Gregory states