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

Reasonable arguments therefore clearly demonstrate that memory manifests in the soul only when she has descended from the intelligible world into the (earthly) heavens. Likewise, it would not surprise us if, when she had risen from here below to the heavens, and had dwelt there, she should remember a great number of things from here below, of which we have already spoken, and that she would recognize many souls which she had known earlier, since these latter must necessarily be joined to bodies with similar countenances. Even though the souls should change the shapes of their bodies, making them spherical, they would still be recognizable by their habits and individual character. There is nothing incredible in this, for in admitting that these souls have purified themselves from all these passions, nothing hinders them from preserving their character. Besides, if they can converse with each other, they have this as an additional means of recognizing each other.