XXIX. (161) On one occasion Moses was urged on, by a desire of learning, to investigate the causes through which the most necessary of things in the world are brought to perfection; for seeing how many things come to an end, and are produced afresh in creation, being again destroyed, and again abiding, he marvelled, and was amazed, and cried out, saying, “The bush (batos) burns, and is not Consumed.”{47}{#ex 3:2.} (162) For he does not trouble his head about the inaccessible (abatos) country as being the abode of divine natures. But now that he is about to undertake a labour which will have no success and no end, he is relieved by the mercy and providence of God, the Saviour of all men, who has given warning out of his holy shrine, “Do not approach near this place,” which is equivalent to, Do not approach this consideration; for it is a business requiring more labour, and more energy, and care, and fondness for investigation than can be suited to human power. But be content with admiring what is created; and do not be overcurious about the causes why each thing is created or destroyed. (163) “For the place,” says God, “on which thou standest is holy Ground.”{48}{#ex 3:5.} What kind of place is that? Is it not plain that it is that which relates to the principles of causes, which is the only one that he has adapted to the divine natures, not thinking any more competent to aim at a clear understanding of the principle of causes? (164) But he who, out of his desire for learning, has raised his head above the whole world begins to inquire concerning the Creator of the world who this being is who is so difficult to see and whose nature it is so difficult to conjecture, whether he is a body, or an incorporeal being, or something above these things, or whether he is a simple nature like a unit, or a compound being or any ordinary existing thing. And when he sees how difficult to ascertain, and how difficult to understand this is, he then prays to be allowed to learn from God himself who God is; for he has never hoped to be able to learn this from any other of the beings that are around him. (165) But nevertheless, though inquiring into the essence of the living God he has heard nothing. For, says, God, “thou shalt see my back parts, but my face thou shalt not Behold.”{49}{#ex 33:23.} For it is sufficient for the wise man to know the consequences, and the things which are after God; but he who wishes to see the principal essence will be blinded by the exceeding brilliancy of his rays before he can see it.