Catechesis: The Eucharist

Second, they hold that the institution of this sacrament, as it was performed by Christ, is effective throughout Christendom and that its power does not rest upon the worthiness or unworthiness of the minister who distributes the sacrament, nor upon the worthiness or unworthiness of the one who receives it because, as St. Paul says, even the unworthy receive the sacrament.—FC SD VII:16