Of the Power of the Keys

Of the Power of the Keys — St. Thomas Aquinas asks: Whether there should be keys in the Church?; Whether the key is the power of binding and loosing, etc.?; Whether there are two keys or only one?.

We must now consider the power of the ministers of this sacrament, which power depends on the keys. As to this matter, in the first place we shall treat of the keys, secondly, of excommunication, thirdly, of indulgences, since these two things are connected with the power of the keys. The first of these considerations will be fourfold: (1) the nature and meaning of the keys. (2) the use of the keys; (3) the ministers of the keys; (4) those on whom the use of the keys can be exercised.

Under the first head there are three points of inquiry:

Article 1: Whether there should be keys in the Church?

It is written (Mat. 16:19): "To thee will I give the keys of the kingdom of heaven."

Further, every dispenser should have the keys of the things that he dispenses. But the ministers of the Church are the dispensers of the divine mysteries, as appears from 1 Cor. 4:1. Therefore they ought to have the keys.

In material things a key is an instrument for opening a door. Now the door of the kingdom is closed to us through sin, both as to the stain and as to the debt of punishment. Wherefore the power of removing this obstacle is called a key. Now this power is in the Divine Trinity by authority; hence some say that God has the key of "authority." But Christ Man had the power to remove the above obstacle, through the merit of His Passion, which also is said to open the door; hence some say that He has the keys of "excellence." And since "the sacraments of which the Church is built, flowed from the side of Christ while He lay asleep on the cross" [*Augustine, Enarr. in Ps. 138], the efficacy of the Passion abides in the sacraments of the Church. Wherefore a certain power for the removal of the aforesaid obstacle is bestowed on the ministers of the Church, who are the dispensers of the sacraments, not by their own, but by a Divine power and by the Passion of Christ. This power is called metaphorically the Church's key, and is the key of "ministry."

Article 2: Whether the key is the power of binding and loosing, etc.?

According to the Philosopher (De Anima ii, text. 33), "powers are defined from their acts." Wherefore, since the key is a kind of power, it should be defined from its act or use, and reference to the act should include its object from which it takes its species, and the mode of acting whereby the power is shown to be well-ordered. Now the act of the spiritual power is to open heaven, not absolutely, since it is already open, as stated above (), but for this or that man; and this cannot be done in an orderly manner without due consideration of the worthiness of the one to be admitted to heaven. Hence the aforesaid definition of the key gives the genus, viz. "power," the subject of the power, viz. the "ecclesiastical judge," and the act, viz. "of excluding or admitting," corresponding to the two acts of a material key which are to open and shut; the object of which act is referred to in the words "from the kingdom," and the mode, in the words, "worthy" and "unworthy," because account is taken of the worthiness or unworthiness of those on whom the act is exercised.

Article 3: Whether there are two keys or only one?

Whenever an act requires fitness on the part of the recipient, two things are necessary in the one who has to perform the act, viz. judgment of the fitness of the recipient, and accomplishment of the act. Therefore in the act of justice whereby a man is given what he deserves, there needs to be a judgment in order to discern whether he deserves to receive. Again, an authority or power is necessary for both these things, for we cannot give save what we have in our power; nor can there be judgment, without the right to enforce it, since judgment is determined to one particular thing, which determination it derives, in speculative matters, from the first principles which cannot be gainsaid, and, in practical matters, from the power of command vested in the one who judges. And since the act of the key requires fitness in the person on whom it is exercised---because the ecclesiastical judge, by means of the key, "admits the worthy and excludes the unworthy," as may be seen from the definition given above ()---therefore the judge requires both judgment of discretion whereby he judges a man to be worthy, and also the very act of receiving (that man's confession); and for both these things a certain power or authority is necessary. Accordingly we may distinguish two keys, the first of which regards the judgment about the worthiness of the person to be absolved, while the other regards the absolution.

These two keys are distinct, not in the essence of authority, since both belong to the minister by virtue of his office, but in comparison with their respective acts, one of which presupposes the other.