re.

In another way one may eat Christ spiritually, as He is under the
sacramental species, inasmuch as a man believes in Christ, while
desiring to receive this sacrament; and this is not merely to eat
Christ spiritually, but likewise to eat this sacrament; which does
not fall to the lot of the angels. And therefore although the angels
feed on Christ spiritually, yet it does not belong to them to eat
this sacrament spiritually.

Reply Obj. 1: The receiving of Christ under this sacrament is
ordained to the enjoyment of heaven, as to its end, in the same way
as the angels enjoy it; and since the means are gauged by the end,
hence it is that such eating of Christ whereby we receive Him under
this sacrament, is, as it were, derived from that eating whereby the
angels enjoy Christ in heaven. Consequently, man is said to eat the
"bread of angels," because it belongs to the angels to do so firstly
and principally, since they enjoy Him in his proper species; and
secondly it belongs to men, who receive Christ under this sacrament.

Reply Obj. 2: Both men and angels belong to the fellowship of His
mystical body; men by faith, and angels by manifest vision. But the
sacraments are proportioned to faith, through which the truth is seen
"through a glass" and "in a dark manner." And therefore, properly
speaking, it does not belong to angels, but to men, to eat this
sacrament spiritually.

Reply Obj. 3: Christ dwells in men through faith, according to their
present state, but He is in the blessed angels by manifest vision.
Consequently the comparison does not hold, as stated above (ad 2).
_______________________

THIRD ARTICLE [III, Q. 80, Art. 3]

Whether the Just Man Alone May Eat Christ Sacramentally?

Objection 1: It seems that none but the just man may eat Christ
sacramentally. For Augustine says in his book _De Remedio
Penitentiae_ (cf. Tract. in Joan. xxv, n. 12; xxvi, n. 1): "Why make
ready tooth and belly? Believe, and thou hast eaten . . . For to
believe in Him, this it is, to eat the living bread." But the sinner
does not believe in Him; because he has not living faith, to which it
belongs to believe "in God," as stated above in the Second Part
(II-II, Q. 2, A. 2; Q. 4, A. 5). Therefore the sinner cannot eat
this sacrament, which is the living bread.

Obj. 2: Further, this sacrament is specially called "the sacrament of
charity," as stated above (Q. 78, A. 3, ad 6). But as unbelievers
lack faith, so all sinners l