Whether words are required for the signification of the sacraments?

Objections

Objection 1 : It seems that words are not required for the signification of the sacraments. For Augustine says (Contra Faust. xix): "What else is a corporeal sacrament but a kind of visible word?" Wherefore to add words to the sensible things in the sacraments seems to be the same as to add words to words. But this is superfluous. Therefore words are not required besides the sensible things in the sacraments .
Objection 2 : Further, a sacrament is some one thing, but it does not seem possible to make one thing of those that belong to different genera. Since, therefore, sensible things and words are of different genera, for sensible things are the product of nature, but words, of reason; it seems that in the sacraments, words are not required besides sensible things.
Objection 3 : Further, the sacraments of the New Law succeed those of the Old Law: since "the former were instituted when the latter were abolished," as Augustine says (Contra Faust. xix). But no form of words was required in the sacraments of the Old Law. Therefore neither is it required in those of the New Law.