Thus the indivisible and the divisible are in the soul two distinct
parts, and not two things mingled together so as to constitute but a
single one. They form a single whole composed of two parts, each of
which is pure and separable from the other by its characteristic power.
If then the part which in the body becomes divisible receives from the
superior part the power of being indivisible, this same part might
simultaneously be divisible and indivisible, as a mixture of divisible
nature and of the (indivisible) power received by it from the higher
part.