Shetler

This distinction has at heart the distinction of the operans in each case; that is, the sacraments are understood by theologians to have an objective efficacy independent of the human minister’s merits because the true operans/operator of the sacraments is Christ Himself, who is perfect.

- Joseph Shetler, “Some Contemporary Questions on Sacramentals Considered according to the Scholastic Theology of Their Mode of Efficacy.” (STL Thesis, Angelicum, 2007), 15.