qu. 1 [*Append. Grat. ad can.
Lex illa]), do not place sacrilege among other sins which are
reckoned species of lust. Therefore it would seem not to be a species
of lust.

Obj. 3: Further, something derogatory to a sacred thing may be done
by the other kinds of vice, as well as by lust. But sacrilege is not
reckoned a species of gluttony, or of any other similar vice.
Therefore neither should it be reckoned a species of lust.

_On the contrary,_ Augustine says (De Civ. Dei xv, 16) that "if it is
wicked, through covetousness, to go beyond one's earthly bounds, how
much more wicked is it through venereal lust to transgress the bounds
of morals!" Now to go beyond one's earthly bounds in sacred matters
is a sin of sacrilege. Therefore it is likewise a sin of sacrilege to
overthrow the bounds of morals through venereal desire in sacred
matters. But venereal desire pertains to lust. Therefore sacrilege is
a species of lust.

_I answer that,_ As stated above (I-II, Q. 18, AA. 6, 7), the act of
a virtue or vice, that is directed to the end of another virtue or
vice, assumes the latter's species: thus, theft committed for the
sake of adultery, passes into the species of adultery. Now it is
evident that as Augustine states (De Virgin. 8), the observance of
chastity, by being directed to the worship of God, becomes an act of
religion, as in the case of those who vow and keep chastity.
Wherefore it is manifest that lust also, by violating something
pertaining to the worship of God, belongs to the species of
sacrilege: and in this way sacrilege may be accounted a species of
lust.

Reply Obj. 1: Lust, by being directed to another vice as its end,
becomes a species of that vice: and so a species of lust may be also
a species of irreligion, as of a higher genus.

Reply Obj. 2: The enumeration referred to, includes those sins which
are species of lust by their very nature: whereas sacrilege is a
species of lust in so far as it is directed to another vice as its
end, and may coincide with the various species of lust. For unlawful
intercourse between persons mutually united by spiritual
relationship, is a sacrilege after the manner of incest. Intercourse
with a virgin consecrated to God, inasmuch as she is the spouse of
Christ, is sacrilege resembling adultery. If the maiden be under her
father's authority, it will be spiritual seduction; and if force be
employed it will be spiritual rape, which kind of rape even the civil
law pun