And as you must know that it is common for there to be great preludes to great propositions, and the greatest of all propositions is virtue, for it is conversant about the most important of all materials, namely, about the universal life of man; very naturally, therefore, that will not employ any short preface, but rather it will use as such, grammar, geometry, astronomy, rhetoric, music, and all the other sorts of contemplation which proceed in accordance with reason; of which Hagar, the handmaid of Sarah, is an emblem, as we will proceed to show.

 Genesis xxix. 31. 

 Exodus xxv. 31. 
 

 "For Sarah," says Moses, "said unto Abraham, Behold, the Lord has closed me up, so that I may not bear children. Go in unto my handmaiden, that thou mayest have children by her." Now, we must take out of the present discussion those conjunctions and connections of body with body which have pleasure for their end. For this is the connection of the mind with virtue, which is desirous to have children by her, and which, if it cannot do so at once, is at all events taught to espouse her handmaid, namely, intermediate instruction.
 And here it is worth while to admire wisdom, by reason of its modesty, which has not thought fit to reproach us with the slowness of our generation, or our absolute barrenness. And this, too, though the oracle says truly that she brought forth no child, not out of envy, but because of the unsuitableness of our own selves. For, says she, "The Lord has closed me up so, that I may not bear children." And she no longer adds the words, "to you," that she may not appear to mention the misfortunes of others, or to reproach them with theirs. "Therefore," says she, "go thou in to my handmaiden," that is to say, to the intermediate instruction of the intermediate and encyclical branches of knowledge, "that you may first have children by her;" for hereafter you shall be able to enjoy a connection with her mistress, tending to the procreation of legitimate children. For grammar, by teaching you the histories which are to be found in the works of the poets and historians, will give you intelligence and abundant learning; and, moreover, will teach you to look with contempt on all the vain fables which erroneous opinions invent, on account of the ill success which history tells us that the heroes and demigods who are celebrated among those writers, meet with.