IX. (45) The name Nachor, being interpreted, means "a rest from light;" and Milcah means "princess;" and Rumah means "she who sees something." Therefore, to have light in the mind is good; but cessation from light, and tranquillity, and immobility is not perfect good, for it is advantageous to have evils tranquil, but it is desirable to have blessings in motion; for what advantage is there in a man's having a tuneful voice, if he keeps silent? (46) or in his having the skill of a flute player, if he does not play the flute? or of his knowing the harp, if he does not strike it? or, in short, what good is there in any artist whatever, if he does not exercise his art? for theoretical knowledge, without putting it in practice, is of no advantage whatever to those who possess it. For a man, though skilful in the contest of the pancratium, or in boxing, or in wrestling, would derive no advantage from his athletic prowess if his hands were tied behind him; and he who was thoroughly practised in running would derive no advantage from his fleetness of foot if he were afflicted with the gout, or if he were to meet with any other injury to his feet. (47) And the light of the soul, which is the most brilliant and the most like the sun, is knowledge; for as the eyes are lightened up by beams, so is the mind made brilliant by wisdom, and becomes gradually accustomed to see more acutely from being continually anointed with new speculations. Therefore, Nachor is interpreted "a cessation from light," very naturally; (48) for, inasmuch as he is a relation of the wise Abraham, he partakes of that light which is according to wisdom; but inasmuch as he did not join him in his emigration from the crated to the uncreated being, from the world to the Creator of the world, he has acquired only a lame and imperfect knowledge, intermittent and delaying, or rather put together like a lifeless statue; (49) for he does not depart and quit his abode in the Chaldaean country, that is to say, he does not separate himself from the speculations concerning astronomy; honouring that which is created rather than him who created it, and the world in preference to God; or rather, I should say, looking on the world itself as an absolute independent God, and not as the work of an absolute God.