VII. (36) Again, even if it is very difficult to ascertain and very hard properly to comprehend, we must still, as far as it is possible, investigate the nature of his essence; for there is no employment more excellent than that of searching out the nature of the true God, even though the discovery may transcend all human ability, since the very desire and endeavour to comprehend it is able by itself to furnish indescribable pleasures and delights. (37) And the witnesses of this fact are those who have not merely tasted philosophy with their outermost lips, but who have abundantly feasted on its reasonings and its doctrines; for the reasoning of these men, being raised on high far above the earth, roams in the air, and soaring aloft with the sun, and moon, and all the firmament of heaven, being eager to behold all the things that exist therein, finds its power of vision somewhat indistinct from a vast quantity of unalloyed light being poured over it, so that the eye of his soul becomes dazzled and confused by the splendour. (38) But he does not on that account faint and renounce the task which he has undertaken, but goes on with invincible determination towards the sight which he considers attainable, as if he were a competitor at the games, and were striving for the second prize, though he has missed the first. And guess and conjecture are inferior to true perception, as are all those notions which are classed under the description of reasonable and plausible opinions. (39) Though, therefore, we do not know and cannot accurately ascertain what each of the stars is as to its pure and real essence, still we are eager to investigate the subject, delighting in probable reasonings, because of the fondness for learning which is implanted in our nature. (40) And so in the same way, though we cannot attain to a distinct conception of the truly living God, we still ought not to renounce the task of investigating his character, because even if we fail to make the discovery, the very search itself is intrinsically useful and an object of deserved ambition; since no one ever blames the eyes of the body because they are unable to look upon the sun itself, and therefore shrink from the brilliancy which is poured upon them from its beams, and therefore look down upon the earth, shrinking from the extreme brilliancy of the rays of the sun.