Marsilio Ficino’s Platonic Theology, Volume I

25Since, then, the intelligible kind can be enlarged far more than the sensible, and so excellent a potency ought not always to remain unrealized in the universe, there are undoubtedly already in act many more species of separate substances than of corporeal things. This is especially so because a more excellent potency claims its own act for itself in the universe both more fully and earlier than a weaker potency. Finally, since the order of the universe is disposed in the best possible way under the infinite Good, it seems altogether to demand that the better things within it be multiplied, so far as possible, beyond the number of the worse—especially since lower things were established for the sake of higher ones. We see this plainly in the very spheres of the world.

26For the nobler a sphere is, the greater is its extent—so much so that, if earth and water are compared with the higher spheres, they are thought to stand as a point to a circumference. What dimension is among bodies, number appears to be among incorporeal things. It is therefore fitting that intellectual substances, since they are the best of things, exist through themselves, and are the ends of all corporeal things created for their sake, should far exceed in number both the motions of the spheres and all bodies.