desiring to excel, man loves himself, for to love
oneself is the same as to desire some good for oneself. Consequently
it amounts to the same whether we reckon pride or self-love as the
beginning of every evil.
________________________

THIRD ARTICLE [I-II, Q. 84, Art. 3]

Whether Any Other Special Sins, Besides Pride and Avarice, Should Be
Called Capital?

Objection 1: It would seem that no other special sins, besides pride
and avarice, should be called capital. Because "the head seems to be
to an animal, what the root is to a plant," as stated in _De Anima_
ii, text. 38: for the roots are like a mouth. If therefore
covetousness is called the "root of all evils," it seems that it
alone, and no other sin, should be called a capital vice.

Obj. 2: Further, the head bears a certain relation of order to the
other members, in so far as sensation and movement follow from the
head. But sin implies privation of order. Therefore sin has not the
character of head: so that no sins should be called capital.

Obj. 3: Further, capital crimes are those which receive capital
punishment. But every kind of sin comprises some that are punished
thus. Therefore the capital sins are not certain specific sins.

_On the contrary,_ Gregory (Moral. xxxi, 17) enumerates certain
special vices under the name of capital.

_I answer that,_ The word capital is derived from _caput_ (a head).
Now the head, properly speaking, is that part of an animal's body,
which is the principle and director of the whole animal. Hence,
metaphorically speaking, every principle is called a head, and even
men who direct and govern others are called heads. Accordingly a
capital vice is so called, in the first place, from "head" taken in
the proper sense, and thus the name "capital" is given to a sin for
which capital punishment is inflicted. It is not in this sense that
we are now speaking of capital sins, but in another sense, in which
the term "capital" is derived from head, taken metaphorically for a
principle or director of others. In this way a capital vice is one
from which other vices arise, chiefly by being their final cause,
which origin is formal, as stated above (Q. 72, A. 6). Wherefore a
capital vice is not only the principle of others, but is also their
director and, in a way, their leader: because the art or habit, to
which the end belongs, is always the principle and the commander in
matters concerning the means. Hence Gregory (Moral. xxxi, 17)