Now the rest are eucharistic sacrifices which are called sacrifices of praise, Lev. 3, 1 f.; 7, 11 f.; Ps. 56, 12 f., namely, the preaching of the Gospel, faith, prayer, thanksgiving, confession, the afflictions of saints yea, all good works of saints. These sacrifices are not satisfactions for those making them, or applicable on behalf of others, so as to merit for these, ex opere operato, the remission of sins or reconciliation. For they are made by those who have been reconciled. And such are the sacrifices of the New Testament, as Peter teaches, 1. Ep. 2, 5: An holy priesthood, to offer up spiritual sacrifices. Spiritual sacrifices, however, are contrasted not only with those of cattle, but even with human works offered _ex opere operato_, because spiritual refers to the movements of the Holy Ghost in us. Paul teaches the same thing Rom. 12, 1: Present your bodies a living sacrifice, holy, acceptable, which is your reasonable service. Reasonable service signifies, however, a service in which God is known and apprehended by the mind, as happens in the movements of fear and trust towards God. Therefore it is opposed not only to the Levitical service, in which cattle are slain, but also to a service in which a work is imagined to be offered _ex opere operato_. The Epistle to the Hebrews, 13, 15, teaches the same thing: By Him, therefore, let us offer the sacrifice of praise to God continually; and he adds the interpretation, that is, the fruit of our lips, giving thanks to His name. He bids us offer praises, i.e., prayer, thanksgiving, confession, and the like. These avail not _ex opere operato_, but on account of faith. This is taught by the clause: By Him let us offer, i.e., by faith in Christ.