על עשרת הדברות ז׳On the Decalogue 7
א׳
1[24] But indeed apart from what has been said, the decad may reasonably be admired because it embraces Nature as seen both with and without extension in space. Nature exists without extension nowhere except in the point; with extension in three forms, line, surface, solid. For space as limited by two points is a line,
ב׳
2[25] but, where there are two dimensions, we have a surface, as the line has expanded into breadth; where there are three, we have a solid, as length and breadth have acquired depth, and here Nature comes to a halt, for she has not produced more than three dimensions.
ג׳
3[26] All these have numbers for their archetypes, 1 for the non-extended point, 2 for the line, 3 for the surface, 4 for the solid, and these one, two, three, four added together make the ten which gives a glimpse of other beauties also to those who have eyes to see.
ד׳
4[27] For we may say that the infinite series of numbers is measured by ten, because its constituent terms are the four, 1, 2, 3, 4, and the same terms produce the hundred out of the tens, since 10, 20, 30, 40 make a hundred, and similarly the thousand is produced out of the hundreds and the ten thousand or myriad out of the thousands, and these, the unit, the ten, the hundred and the thousand are the four starting-points from each of which springs a ten. And again,
ה׳
5[28] this same ten, apart from what has already been said, reveals other differences in numbers; the order of prime numbers divisible by the unit alone having for its pattern three, five, seven: the square, that is four, the cube, eight, the products respectively of two and three equal numbers, and the perfect number six equal to the sum of its factors 3, 2 and 1.