Plotinos: Complete Works, v. 2 In Chronological Order,...

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.