ordained to anything exceeding the proportion of the powers which are
the principles of its act; for it is a law of Divine providence that
nothing shall act beyond its powers. Now everlasting life is a good
exceeding the proportion of created nature; since it exceeds its
knowledge and desire, according to 1 Cor. 2:9: "Eye hath not seen,
nor ear heard, neither hath it entered into the heart of man." And
hence it is that no created nature is a sufficient principle of an
act meritorious of eternal life, unless there is added a supernatural
gift, which we call grace. But if we speak of man as existing in sin,
a second reason is added to this, viz. the impediment of sin. For
since sin is an offense against God, excluding us from eternal life,
as is clear from what has been said above (Q. 71, A. 6; Q. 113, A.
2), no one existing in a state of mortal sin can merit eternal life
unless first he be reconciled to God, through his sin being forgiven,
which is brought about by grace. For the sinner deserves not life,
but death, according to Rom. 6:23: "The wages of sin is death."

Reply Obj. 1: God ordained human nature to attain the end of eternal
life, not by its own strength, but by the help of grace; and in this
way its act can be meritorious of eternal life.

Reply Obj. 2: Without grace a man cannot have a work equal to a work
proceeding from grace, since the more perfect the principle, the more
perfect the action. But the objection would hold good, if we supposed
the operations equal in both cases.

Reply Obj. 3: With regard to the first reason adduced, the case is
different in God and in man. For a man receives all his power of
well-doing from God, and not from man. Hence a man can merit nothing
from God except by His gift, which the Apostle expresses aptly saying
(Rom. 11:35): "Who hath first given to Him, and recompense shall be
made to him?" But man may merit from man, before he has received
anything from him, by what he has received from God.

But as regards the second proof taken from the impediment of sin, the
case is similar with man and God, since one man cannot merit from
another whom he has offended, unless he makes satisfaction to him and
is reconciled.
________________________

THIRD ARTICLE [I-II, Q. 114, Art. 3]

Whether a Man in Grace Can Merit Eternal Life Condignly?

Objection 1: It would seem that a man in grace cannot merit eternal
life condignly, for the Apostle says (Rom. 8:18): "The sufferings