[26] And this class of men is small, indeed, in number; but in power it is very numerous and very great, so that even the whole circle of the earth cannot contain it. And it reaches even to heaven; for as it is possessed of an indescribable love of contemplation and of being always among divine objects, when it has thoroughly investigated and explained all that nature which is perceptible to the sight, it immediately proceeds onwards to that which is incorporeal and appreciable only by the intellect, without requiring the assistance of any one of the outward senses, indeed discarding even the irrational parts of the soul, and employing those parts only which are called mind and reason.