But the knowledge of those who think themselves wise, whether the barbarian sects or the philosophers among the Greeks, according to the apostle, “puffeth up.” But that knowledge, which is the scientific demonstration of what is delivered according to the true philosophy, is founded on faith. Now, we may say that it is that process of reason which, from what is admitted, procures faith in what is disputed. Now, faith being twofold—the faith of knowledge and that of opinion—nothing prevents us from calling demonstration twofold, the one resting on knowledge, the other on opinion; since also knowledge and foreknowledge are designated as twofold, that which is essentially accurate, that which is defective. And is not the demonstration, which we possess, that alone which is true, as being supplied out of the divine Scriptures, the sacred writings, and out of the “God-taught wisdom,” according to the apostle? Learning, then, is also obedience to the commandments, which is faith in God. And faith is a power of God, being the strength of the truth. For example, it is said, “If ye have faith as a grain of mustard, ye shall remove the mountain.” And again, “According to thy faith let it be to thee.” And one is cured, receiving healing by faith; and the dead is raised up in consequence of the power of one believing that he would be raised. The demonstration, however, which rests on opinion is human, and is the result of rhetorical arguments or dialectic syllogisms. For the highest demonstration, to which we have alluded, produces intelligent faith by the adducing and opening up of the Scriptures