Platonicae quaestiones
Plutarch
Plutarch. Plutarch's Morals, Vol. V. Goodwin, William W., editor; Brown, R., translator. Boston: Little, Brown, and Company; Cambridge: Press of John Wilson and Son, 1874.
WHAT IS THE REASON THAT, THOUGH PLATO ALWAYS SAYS THAT THE SOUL IS ANCIENTER THAN THE BODY, AND THAT IT IS THE CAUSE AND PRINCIPLE OF ITS RISE, YET HE LIKEWISE SAYS, THAT NEITHER COULD THE SOUL EXIST WITHOUT THE BODY, NOR THE REASON WITHOUT THE SOUL, BUT THE SOUL IN THE BODY AND THE REASON IN THE SOUL? FOR SO THE BODY WILL SEEM TO BE AND NOT TO BE, BECAUSE IT BOTH EXISTS WITH THE SOUL, AND IS BEGOT BY THE SOUL.
Perhaps what we have often said is true; viz., that the soul without reason and the body without form did mutually ever coexist, and neither of them had generation or beginning. But after the soul did partake of reason and harmony, and being through consent made wise, it wrought a change in matter, and being stronger than the other’s motions, it drew and converted these motions to itself. So the body of the world drew its original from the soul, and became conformable and like to it. For the soul did not make the Nature of the body out of itself, or out of nothing; but it wrought an orderly and pliable body out of one disorderly and formless. Just as if a man should say that the virtue of the seed is with the body, and yet that the body of the fig-tree or olive-tree was made of the seed, he would not be much out; for the body, its innate motion and mutation proceeding from the seed, grew up and became what it is. So, when formless and indefinite matter was once formed by the inbeing soul, it received such a form and disposition.
WHY, SINCE BODIES AND FIGURES ARE CONTAINED PARTLY BY RECTTLINEARS AND PARTLY BY CIRCLES, DOES HE MAKE ISOSCELES TRIANGLES AND TRIANGLES OF UNEQUAL SIDES THE PRINCIPLES OF RECTILINEARS; OF WHICH THE ISOSCELES TRIANGLE FORMS THE CUBE, THE ELEMENT OF THE EARTH; AND A SCALENE TRIANGLE FORMS THE PYRAMID WHICH IS THE SEED OF FIRE, THE OCTAHEDRON WHICH IS THE SEED OF AIR, AND THE ICOSAHEDRON WHICH IS THE SEED OF WATER;—WHILE HE DOES NOT MEDDLE WITH CIRCULARS, THOUGH HE DOES MENTION THE GLOBE, WHERE HE SAYS THAT EACH OF THE AFORE-RECKONED FIGURES DIVIDES A ROUND BODY THAT ENCLOSES IT INTO EQUAL PARTS.[*](See Timaeus, pp. 53-56.)
Is their opinion true who think that he ascribed a dodecahedron to the globe, when he says that God made use of it in delineating the universe? For upon account of the multitude of its bases and the obtuseness of its angles, avoiding all rectitude, it is flexible, and by circumtension, like globes made of twelve skins, it becomes circular and comprehensive. For it has twenty solid angles, each of which is contained by three obtuse planes, and each of these contains one and the fifth part of a right angle. Now it is made up of twelve equilateral and equangular quinquangles (or pentagons), each of which consists of thirty of the first scalene triangles. Therefore it seems to resemble both the Zodiac and the year, it being divided into the same number of parts as these.
Or is a right line in Nature prior to circumference; or is circumference but an accident of rectilinear? For a right line is said to bend; and a circle is described by a centre and distance, which is the place of a right line by which a circumference is measured, this being everywhere equally distant from the middle. And a cone and a cylinder are made by rectilinears; a cone by keeping one side of a triangle fixed and carrying another round with the
base,—a cylinder, by doing the like with a parallelogram. Further, that is nearest to principle which is less; but a right is the least of all lines, as it is simple; whereas in a circumference one part is convex without, another concave within. Besides, numbers are before figures, as unity is before a point, which is unity in position. But indeed unity is triangular; for every triangular number[*](Triangular numbers are those of which equilateral triangles can be formed in this way:— Such are 3, 6, 10, 15, 21, 28, 36, 45, etc.; that is, numbers formed by adding the digits in regular order. (G.)) taken eight times, by adding unity, becomes quadrate; and this happens to unity. Therefore a triangle is before a circle, whence a right line is before a circumference. Besides, no element is divided into things compounded of itself; indeed there is a dissolution of all other things into the elements. Now a triangle is divided into no circumference, but two diameters cut a circle into four triangles; therefore a rectilinear figure is before a circular, and has more of the nature of an element. And Plato himself shows that a rectilinear is in the first place, and a circular is only consequential and accidental. For when he says the earth consists of cubes, each of which is contained with rectilinear superficies, he says the earth is spherical and round. Therefore there was no need of making a peculiar element for round things, since rectilinears, fitted after a certain manner among themselves, do make up this figure.Besides, a right line, whether great or little, preserves the same rectitude; but as to the circumference of a circle, the less it is, the crookeder it is; the larger, the straighter. Therefore if a convex superficies stands on a plane, it sometimes touches the subject plane in a point, sometimes in a line. So that a man may imagine that a circumference is made up of little right lines.