“By faith we understand that the worlds were framed by the word of God, so that what is seen was not made of things which appear,” says the apostle. “By faith Abel offered to God a fuller sacrifice than Cain, by which he received testimony that he was righteous, God giving testimony to him respecting his gifts; and by it he, being dead, yet speaketh,” and so forth, down to “than enjoy the pleasures of sin for a season.”[24] Faith having, therefore, justified these before the law, made them heirs of the divine promise. Why then should I review and adduce any further testimonies of faith from the history in our hands? “For the time would fail me were I to tell of Gideon, Barak, Samson, Jephtha, David, and Samuel, and the prophets,” and what follows.[25] Now, inasmuch as there are four things in which the truth resides--Sensation, Understanding, Knowledge, Opinion,--intellectual apprehension is first in the order of nature; but in our case, and in relation to ourselves, Sensation is first, and of Sensation and Understanding the essence of Knowledge is formed; and evidence is common to Understanding and Sensation. Well, Sensation is the ladder to Knowledge; while Faith, advancing over the pathway of the objects of sense, leaves Opinion behind, and speeds to things free of deception, and reposes in the truth. Should one say that Knowledge is founded on demonstration by a process of reasoning, let him hear that first principles are incapable of demonstration; for they are known neither by art nor sagacity. For the latter is conversant about objects that are susceptible of change, while the former is practical solely, and not theoretical.[26] Hence it is thought that the first cause of the universe can be apprehended by faith alone. For all knowledge is capable of being taught; and what is capable of being taught is founded on what is known before. But the first cause of the universe was not previously known to the Greeks; neither, accordingly, to Thales, who came to the conclusion that water was the first cause; nor to the other natural philosophers who succeeded him, since it was Anaxagoras who was the first who assigned to Mind the supremacy over material things. But not even he preserved the dignity suited to the efficient cause, describing as he did certain silly vortices, together with the inertia and even foolishness of Mind. Wherefore also the Word says, “Call no man master on earth.”[27] For knowledge is a state of mind that results from demonstration; but Faith is a grace which from what is indemonstrable conducts to what is universal and simple, what is neither with matter, nor matter, nor under matter. But those who believe not, as to be expected, drag all down from heaven, and the region of the invisible, to earth, “absolutely grasping with their hands rocks and oaks,” according to Plato. For, clinging to all such things, they asseverate that that alone exists which can be touched and handled, defining body