Do we not offer it up every day in memory of His death?" Secondly it is called a sacrifice, in respect of the effect of His Passion: because, to wit, by this sacrament, we are made partakers of the fruit of our Lord's Passion . . . ” Summa Theologica III qu. 83, art. 1.
Secondo, per i suoi legami con gli effetti della passione: cioè in quanto mediante questo sacramento diveniamo partecipi del frutto della passione del Signore . . . ” Summa Teologica III qu. 83, art. 1.