Reply Obj. 2: Hope cannot lead to faith absolutely. For one cannot hope to obtain eternal happiness, unless one believes this possible, since hope does not tend to the impossible, as stated above (I-II, Q. 40, A. 1). It is, however, possible for one to be led by hope to persevere in faith, or to hold firmly to faith; and it is in this sense that hope is said to lead to faith.
Reply Obj. 3: Obedience is twofold: for sometimes it denotes the inclination of the will to fulfil God's commandments. In this way it is not a special virtue, but is a general condition of every virtue; since all acts of virtue come under the precepts of the Divine law, as stated above (I-II, Q. 100, A. 2); and thus it is requisite for faith. In another way, obedience denotes an inclination to fulfil the commandments considered as a duty. In this way it is a special virtue, and a part of justice: for a man does his duty by his superior when he obeys him: and thus obedience follows faith, whereby man knows that God is his superior, Whom he must obey.
Reply Obj. 4: To be a foundation a thing requires not only to come first, but also to be connected with the other parts of the building: since the building would not be founded on it unless the other parts adhered to it. Now the connecting bond of the spiritual edifice is charity, according to Col. 3:14: "Above all . . . things have charity which is the bond of perfection." Consequently faith without charity cannot be the foundation: and yet it does not follow that charity precedes faith.
Reply Obj. 5: Some act of the will is required before faith, but not an act of the will quickened by charity. This latter act presupposes faith, because the will cannot tend to God with perfect love, unless the intellect possesses right faith about Him. _______________________
EIGHTH ARTICLE [II-II, Q. 4, Art. 8]
Whether Faith Is More Certain Than Science and the Other Intellectual
Virtues?
Objection 1: It would seem that faith is not more certain than science and the other intellectual virtues. For doubt is opposed to certitude, wherefore a thing would seem to be the more certain, through being less doubtful, just as a thing is the whiter, the less it has of an admixture of black. Now understanding, science and also wisdom are free of any doubt about their objects; whereas the believer may sometimes suffer a movement of doubt, and doubt about matters of faith. Therefore faith is no more certain than the intellectual virtues.
Obj. 2: Further, sight is more certain than hearing. But "faith is through hearing" according to Rom. 10:17; whereas understanding, science and wisdom imply some kind of intellectual sight. Therefore science and understanding are more certain than faith.
Obj. 3: Further, in matters concerning the intellect, the more perfect is the more certain. Now understanding is more perfect than faith, since faith is the way to understanding, according to another version [*The Septuagint] of Isa. 7:9: "If you will not believe, you shall not understand [Vulg.: 'continue']": and Augustine says (De Trin. xiv, 1) that "faith is strengthened by science." Therefore it seems that science or understanding is more certain than faith.
On the contrary, The Apostle says (1 Thess. 2:15): "When you had received of us the word of the hearing," i.e. by faith . . . "you received it not as the word of men, but, as it is indeed, the word of God." Now nothing is more certain than the word of God. Therefore science is not more certain than faith; nor is anything else.