re eternal, there could
not be many eternities. Therefore God alone is not the only eternal.

Obj. 2: Further, it is written "Depart, ye cursed into eternal
[Douay: 'everlasting'] fire" (Matt. 25:41). Therefore God is not the
only eternal.

Obj. 3: Further, every necessary thing is eternal. But there are
many necessary things; as, for instance, all principles of
demonstration and all demonstrative propositions. Therefore God is
not the only eternal.

_On the contrary,_ Jerome says (Ep. ad Damasum, xv) that "God is the
only one who has no beginning." Now whatever has a beginning, is not
eternal. Therefore God is the only one eternal.

_I answer that,_ Eternity truly and properly so called is in God alone,
because eternity follows on immutability; as appears from the first
article. But God alone is altogether immutable, as was shown above
(Q. 9, A. 1). Accordingly, however, as some receive immutability
from Him, they share in His eternity. Thus some receive immutability
from God in the way of never ceasing to exist; in that sense it is
said of the earth, "it standeth for ever" (Eccl. 1:4). Again, some
things are called eternal in Scripture because of the length of their
duration, although they are in nature corruptible; thus (Ps. 75:5) the
hills are called "eternal" and we read "of the fruits of the eternal
hills." (Deut. 33:15). Some again, share more fully than others in the
nature of eternity, inasmuch as they possess unchangeableness either
in being or further still in operation; like the angels, and the
blessed, who enjoy the Word, because "as regards that vision of the
Word, no changing thoughts exist in the Saints," as Augustine says (De
Trin. xv). Hence those who see God are said to have eternal life;
according to that text, "This is eternal life, that they may know Thee
the only true God," etc. (John 17:3).

Reply Obj. 1: There are said to be many eternities, accordingly as
many share in eternity, by the contemplation of God.

Reply Obj. 2: The fire of hell is called eternal, only because it
never ends. Still, there is change in the pains of the lost,
according to the words "To extreme heat they will pass from snowy
waters" (Job 24:19). Hence in hell true eternity does not exist, but
rather time; according to the text of the Psalm "Their time will be
for ever" (Ps. 80:16).

Reply Obj. 3: Necessary means a certain mode of truth; and truth,
according to the Philosopher (Metaph. vi), is in the mind. Therefo