Whether the institution of this sacrament was appropriate?

❌ Objection 1 : It seems that the institution of this sacrament was not appropriate, because as the Philosopher says (De Gener. ii): "We are nourished by the things from whence we spring." But by Baptism, which is spiritual regeneration, we receive our spiritual being, as Dionysius says (Eccl. Hier. ii). Therefore we are also nourished by Baptism. Consequently there was no need to institute this sacrament as spiritual nourishment.

❌ Objection 2 : Further, men are united with Christ through this sacrament as the members with the head. But Christ is the Head of all men, even of those who have existed from the beginning of the world, as stated above (Question [8], Articles [3],6). Therefore the institution of this sacrament should not have been postponed till the Lord's supper.

❌ Objection 3 : Further, this sacrament is called the memorial of our Lord's Passion, according to Mt. 26 (Lk. 22:19): "Do this for a commemoration of Me." But a commemoration is of things past. Therefore, this sacrament should not have been instituted before Christ's Passion.

❌ Objection 4 : Further, a man is prepared by Baptism for the Eucharist, which ought to be given only to the baptized. But Baptism was instituted by Christ after His Passion and Resurrection, as is evident from Mt. 28:19. Therefore, this sacrament was not suitably instituted before Christ's Passion.