Whether there be in the sacraments a power of causing grace?

Objections

Objection 1 : It seems that there is not in the sacraments a power of causing grace. For the power of causing grace is a spiritual power. But a spiritual power cannot be in a body; neither as proper to it, because power flows from a thing's essence and consequently cannot transcend it; nor as derived from something else, because that which is received into anything follows the mode of the recipient. Therefore in the sacraments there is no power of causing grace.
Objection 2 : Further, whatever exists is reducible to some kind of being and some degree of good. But there is no assignable kind of being to which such a power can belong; as anyone may see by running. through them all. Nor is it reducible to some degree of good; for neither is it one of the goods of least account, since sacraments are necessary for salvation: nor is it an intermediate good, such as are the powers of the soul, which are natural powers; nor is it one of the greater goods, for it is neither grace nor a virtue of the mind. Therefore it seems that in the sacraments there is no power of causing grace.
Objection 3 : Further, if there be such a power in the sacraments, its presence there must be due to nothing less than a creative act of God. But it seems unbecoming that so excellent a being created by God should cease to exist as soon as the sacrament is complete. Therefore it seems that in the sacraments there is no power for causing grace.
Objection 4 : Further, the same thing cannot be in several. But several things concur in the completion of a sacrament, namely, words and things: while in one sacrament there can be but one power. Therefore it seems that there is no power of causing grace in the sacraments.