XXVI. (146) And yet even this is not unknown to any one, namely, that philosophy has bestowed upon all the particular sciences their first principles and seeds, from which speculations respecting them appear to arise. For it is geometry which invented equilateral and scalene triangles, and circles, and polygons, and all kinds of other figures. But it was no longer geometry that discovered the nature of a point, and line, and a superficies, and a solid, which are the roots and foundations of the aforementioned figures. (147) For from whence could it define and pronounce that a point is that which has no parts, that a line is length without breadth; that a superficies is that which has only length and breadth; that a solid is that which has the three properties, length, breadth, and depth? For these discoveries belong to philosophy, and the consideration of these definitions belongs wholly to the philosopher. (148) Again, to write and read is the undertaking of this more imperfect kind of grammar, which some people, perverting the name of, call grammatistica. But to the most perfect kind of grammar belongs the explanation of the great works of the poets and historians. When, therefore, men are going through the different parts of speech, and they not in so doing trying to drag over to themselves and appropriate as a kind of accessory the discoveries of philosophy? (149) For it is the peculiar province of philosophy to inquire what a conjection, what a noun, what a verb, what a common noun, what a particular noun, what is deficient in a speech, what is superfluous, what is an affirmative, what an interrogative, what an indirect question, what is a comprehensive expression, what is a supplicatory form of address. For this is a science which has been compounded for the purpose of the investigation of independent propositions, and axioms, and categorems. (150) But, moreover, has not the whole question of semi-vowels, or vowels, or such elements as are completely mute, and the consideration of the sense in which each of these expressions is ordinarily used, and in short every notion connected with the voice, and the elements, and the parts of speech, been thoroughly worked out and brought to an accurate system by philosophy? And those thieves, after having as it were carried off a few drops from her torrent, and having sought to impregnate their own shallow souls with what they have stolen, are not ashamed to bring forth her resources as their own.
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