Thomas Aquinas

“ Hence a bishop alone is properly called a prelate of the Church, wherefore he alone, like a bridegroom, receives the ring of the Church. Consequently full power in the dispensation of the sacraments, and jurisdiction in the public tribunal, belong to him alone as the public person, but to others by delegation from him. Those priests who have charge of the people are not prelates strictly speaking, but assistants, hence, in consecrating priests the bishop says: "The more fragile we are, the more we need these assistants": and for this reason they do not dispense all the sacraments. ”

“ I answer that, Indulgences are effective, in as much as the works of satisfaction done by one person are applied to another, not only by virtue of charity, but also by the intention of the person who did them being directed in some way to the person to whom they are applied. ”

“ First, because, although those communications loose man from the debt of punishment in the sight of God, yet he is not freed from the obligation of fulfilling the satisfaction enjoined, to which he is bound by a commandment of the Church; whereas the third communication frees man even from this obligation. Secondly, because in one person or even in one congregation there is not such an unfailing supply of merits as to be sufficient both for the one person or congregation and for all others ”

“ But any individual can assign his own goods to another and thus offer satisfaction for a third person. Therefore a prelate can assign the property of the multitude subject to him, and so it seems that he can grant indulgences. ”