Thomas Aquinas - Summa Theologica, Part II-II (Secunda Secundae)

On the contrary, The symbol was drawn up by a general council. Now such a council cannot be convoked otherwise than by the authority of the Sovereign Pontiff, as stated in the Decretals [*Dist. xvii, Can. 4, 5]. Therefore it belongs to the authority of the Sovereign Pontiff to draw up a symbol.

I answer that, As stated above (Obj. 1), a new edition of the symbol becomes necessary in order to set aside the errors that may arise. Consequently to publish a new edition of the symbol belongs to that authority which is empowered to decide matters of faith finally, so that they may be held by all with unshaken faith. Now this belongs to the authority of the Sovereign Pontiff, "to whom the more important and more difficult questions that arise in the Church are referred," as stated in the Decretals [*Dist. xvii, Can. 5]. Hence our Lord said to Peter whom he made Sovereign Pontiff (Luke 22:32): "I have prayed for thee," Peter, "that thy faith fail not, and thou, being once converted, confirm thy brethren." The reason of this is that there should be but one faith of the whole Church, according to 1 Cor. 1:10: "That you all speak the same thing, and that there be no schisms among you": and this could not be secured unless any question of faith that may arise be decided by him who presides over the whole Church, so that the whole Church may hold firmly to his decision. Consequently it belongs to the sole authority of the Sovereign Pontiff to publish a new edition of the symbol, as do all other matters which concern the whole Church, such as to convoke a general council and so forth.

Reply Obj. 1: The truth of faith is sufficiently explicit in the teaching of Christ and the apostles. But since, according to 2 Pet. 3:16, some men are so evil-minded as to pervert the apostolic teaching and other doctrines and Scriptures to their own destruction, it was necessary as time went on to express the faith more explicitly against the errors which arose.

Reply Obj. 2: This prohibition and sentence of the council was intended for private individuals, who have no business to decide matters of faith: for this decision of the general council did not take away from a subsequent council the power of drawing up a new edition of the symbol, containing not indeed a new faith, but the same faith with greater explicitness. For every council has taken into account that a subsequent council would expound matters more fully than the preceding council, if this became necessary through some heresy arising. Consequently this belongs to the Sovereign Pontiff, by whose authority the council is convoked, and its decision confirmed.

Reply Obj. 3: Athanasius drew up a declaration of faith, not under the form of a symbol, but rather by way of an exposition of doctrine, as appears from his way of speaking. But since it contained briefly the whole truth of faith, it was accepted by the authority of the Sovereign Pontiff, so as to be considered as a rule of faith. Since it contained briefly the whole truth of faith, it was accepted by the authority of the Sovereign Pontiff, so as to be considered as a rule of faith.

We must now consider the act of faith, and (1) the internal act; (2) the external act.

Under the first head there are ten points of inquiry:

(1) What is "to believe," which is the internal act of faith?

(2) In how many ways is it expressed?

(3) Whether it is necessary for salvation to believe in anything above natural reason?

(4) Whether it is necessary to believe those things that are attainable by natural reason?

(5) Whether it is necessary for salvation to believe certain things explicitly?

(6) Whether all are equally bound to explicit faith?

(7) Whether explicit faith in Christ is always necessary for salvation?

(8) Whether it is necessary for salvation to believe in the Trinity explicitly?

(9) Whether the act of faith is meritorious?

(10) Whether human reason diminishes the merit of faith? _______________________

FIRST ARTICLE [II-II, Q. 2, Art. 1]

Whether to Believe Is to Think with Assent?

Objection 1: It would seem that to believe is not to think with assent. Because the Latin word "cogitatio" [thought] implies a research, for "cogitare" [to think] seems to be equivalent to "coagitare," i.e. "to discuss together." Now Damascene says (De Fide Orth. iv) that faith is "an assent without research." Therefore thinking has no place in the act of faith.

Obj. 2: Further, faith resides in the reason, as we shall show further on (Q. 4, A. 2). Now to think is an act of the cogitative power, which belongs to the sensitive faculty, as stated in the First Part (Q. 78, A. 4). Therefore thought has nothing to do with faith.

Obj. 3: Further, to believe is an act of the intellect, since its object is truth. But assent seems to be an act not of the intellect, but of the will, even as consent is, as stated above (I-II, Q. 15, A. 1, ad 3). Therefore to believe is not to think with assent.

On the contrary, This is how "to believe" is defined by Augustine (De Praedest. Sanct. ii).

I answer that, "To think" can be taken in three ways. First, in a general way for any kind of actual consideration of the intellect, as Augustine observes (De Trin. xiv, 7): "By understanding I mean now the faculty whereby we understand when thinking." Secondly, "to think" is more strictly taken for that consideration of the intellect, which is accompanied by some kind of inquiry, and which precedes the intellect's arrival at the stage of perfection that comes with the certitude of sight. In this sense Augustine says (De Trin. xv, 16) that "the Son of God is not called the Thought, but the Word of God. When our thought realizes what we know and takes form therefrom, it becomes our word. Hence the Word of God must be understood without any thinking on the part of God, for there is nothing there that can take form, or be unformed." In this way thought is, properly speaking, the movement of the mind while yet deliberating, and not yet perfected by the clear sight of truth. Since, however, such a movement of the mind may be one of deliberation either about universal notions, which belongs to the intellectual faculty, or about particular matters, which belongs to the sensitive part, hence it is that "to think" is taken secondly for an act of the deliberating intellect, and thirdly for an act of the cogitative power.

Accordingly, if "to think" be understood broadly according to the first sense, then "to think with assent," does not express completely what is meant by "to believe": since, in this way, a man thinks with assent even when he considers what he knows by science [*Science is certain knowledge of a demonstrated conclusion through its demonstration.], or understands. If, on the other hand, "to think" be understood in the second way, then this expresses completely the nature of the act of believing. For among the acts belonging to the intellect, some have a firm assent without any such kind of thinking, as when a man considers the things that he knows by science, or understands, for this consideration is already formed. But some acts of the intellect have unformed thought devoid of a firm assent, whether they incline to neither side, as in one who "doubts"; or incline to one side rather than the other, but on account of some slight motive, as in one who "suspects"; or incline to one side yet with fear of the other, as in one who "opines." But this act "to believe," cleaves firmly to one side, in which respect belief has something in common with science and understanding; yet its knowledge does not attain the perfection of clear sight, wherein it agrees with doubt, suspicion and opinion. Hence it is proper to the believer to think with assent: so that the act of believing is distinguished from all the other acts of the intellect, which are about the true or the false.