Diomedes saith: Thou hast spoken already, O Moses”, in an ungrudging manner, as became thee; I will also confirm thy words, passing over the hardness of the elements which the wise desire to remove, this disposition being most precious in their eyes. Know, O ye seekers after this doctrine, that man does not proceed except from aman; that only which is like unto themselves is begotten from brute animals; and so also with flying creatures. I have treated these matters in compendious fashion, exalting you towards the truth, who yourselves omit prolixity, for Nature is truly not improved by Nature, save with her own nature, seeing that thou: thyself art not improved except in thy son, that is to say, man in man.* See, therefore, that ye do not neglect the precepts concerning her, but make use of venerable Nature, for out of her Art cometh, and out of no other. Know also that unless you seize hold of this Nature and rule it, ye will obtain nothing. Join, therefore, that male, who is son to the red slave,* in marriage with his fragrant wife, which having been done, Art is produced between them; add no foreign matter unto these things, neither powder nor anything else; that conception is sufficient for us, for it is near, yet the son is nearer still.t How exceeding precious is the nature of that red slave, without which the regimen cannot endure! Bacsen sazth: O Diomedes, thou hast publicly revealed this disposition! He answereth: I will even shed more light upon it. Woe unto you who fear not God, for He may deprive you of this art! Why, therefore, are you envious towards your brethren? They answer: We do not flee except from fools; tell us, therefore, what is thy will? And he: Place Citrine with his wife after the conjunction into the bath; do not kindle the bath excessively, lest they be deprived of sense and motion; cause them to remain in the bath until their body, and the colour thereof, shall become a certain unity, whereupon restore unto it the sweat thereof; again suffer it to die; then give it rest, and beware lest ye evaporate them by burning them in too strong a fire. Venerate the king and his wife,* and do not burn them, since you know not when you may have need of these things, which improve the king and his wife. Cook them, therefore, until they become black, then white, afterwards red, and finally until a tingeing venom is produced. O seekers after this Science, happy are ye, if ye understand, but if not, I have still performed my duty, and that briefly, so that if ye remain ignorant, it is God who hath concealed the truth from you! Blame not, therefore, the Wise, but yourselves, for if God knew that ye possessed a faithful mind, most certainly he would reveal unto you the truth. Behold, I have established you therein, and have extricated you from error!