How the Eucharist effects salvation

Since [the Eucharist] is the sacrament of the Lord’s passion, it contains in itself the Christ who suffered. Thus whatever is an effect of our Lord’s passion is an effect of this sacrament. For this sacrament is nothing other than the application of our Lord’s passion to us. . . . Hence it is clear that the destruction of death, which Christ accomplished by his death, and the restoration of life, which he effected by his resurrection, are effects of this sacrament.

—St. Thomas Aquinas, In Ioannem 6:56, para. 963 (cited in Eugene Rogers Jr., Blood Theology [Cambridge UP, 2021], 192–93)