XII. (50) These, then, were the things which it was necessary to explain beforehand. But now we must turn to the commands themselves, and investigate everything which is marked by especial importance or difference in them. Now God divided them, being ten, as they are, into two tables of five each, which he engraved on two pillars. And the first five have the precedence and pre-eminence in honour; but the second five have an inferior place assigned to them. But both the tables are beautiful and advantageous to life, opening to men wrought and level roads kept within limits by one end, so as to secure the unwavering and secure progress of that soul which is continually desiring what is most excellent. (51) Now the most excellent five were of this character, they related to the monarchial principle on which the world is governed; to images and statues, and in short to all erections of any kind made by hand; to the duty of not taking the name of God in vain; to that of keeping the holy seventh day in a manner worthy of its holiness; to paying honour to parents both separately to each, and commonly to both. So that of the one table the beginning is the God and Father and Creator of the universe; and the end are one's parents, who imitate his nature, and so generate the particular individuals. And the other table of five contains all the prohibitions against adulteries, and murder, and theft, and false witness, and covetousness. (52) But we must consider, with all the accuracy possible, each of these oracles separately, not looking upon any one of them as superfluous. Now the best beginning of all living beings is God, and of all virtues, piety. And we must, therefore, speak of these two principles in the first place. There is an error of no small importance which has taken possession of the greater portion of mankind concerning a subject which was likely by itself, or, at least, above all other subjects, to have been fixed with the greatest correctness and truth in the mind of every one; (53) for some nations have made divinities of the four elements, earth and water, and air and fire. Others, of the sun and moon, and of the other planets and fixed stars. Others, again, of the whole world. And they have all invented different appellations, all of them false, for these false gods put out of sight that most supreme and most ancient of all, the Creator, the ruler of the great city, the general of the invincible army, the pilot who always guides everything to its preservation; (54) for they call the earth Proserpine, and Ceres, and Pluto. And the sea they call Neptune, inventing besides a number of marine deities as subservient to him, and vast companies of attendants, both male and female. The air they call Juno; fire, Vulcan; and the sun, Apollo; the moon, Diana; and the evening star, Venus; Lucifer, they call Mercury; (55) and to every one of the stars they have affixed names and given them to the inventors of fables, who have woven together cleverly-contrived imaginations to deceive the ear, and have appeared to have been themselves the ingenious inventors of these names thus given. (56) Again, in their descriptions, they divided the heaven into two parts, each one hemisphere, the one being above the earth and the other under the earth, which they called the Dioscuri; [dios kouroi. Sons of Jupiter, i.e., Castor and Pollux. The Gemini or Twins of the Zodiac. The story of their living and dying on alternate days is alluded to by Virgil, Aen. 6.121, where Aeneas says (as it is translated by Dryden)--"If Pollux, off'ring his alternate life, / Could free his brother; and can daily go / By turns aloft, by turns descend below."] inventing, besides, a marvellous story concerning their living on alternate days. (57) For, as the heaven is everlasting revolving, in a circle without any cessation or interruption, it follows of necessity that each of the hemispheres must every day be in a different position from that which it was in the day before, everything being turned upside down as far as appearance goes, at least; for, in point of fact, there is no such thing as any uppermost or undermost in a spherical figure. And this expression is only used with reference to our own formation and position; that which is over our head being called uppermost, and that which is in the opposite direction being called undermost. (58) Accordingly, to one who understands how to apply himself to philosophy in a genuine, honest spirit, and who lays claim to a guiltless and pure piety, God gives that most beautiful and holy commandment, that he shall not believe that any one of the parts of the world is its own master, for it has been created; and the fact of having been created implies a liability to destruction, even though the thing created may be made immortal by the providence of the Creator; and there was a time once when it had no existence, but it is impiety to say that there was a previous time when God did not exist, and that he was born at some time, and that he does not endure for ever.