Gregory Thaumaturgus

“ Consequently, if it has been shown that things which are can be apprehended by us, and if the senses, apart from reason, are an erroneous test of objects, it follows that the intellect [2] is what distinguishes all things in reason, and discerns things as they are in their actuality. But the intellect is just the rational portion of the soul, and consequently the soul is rational. ”

“ VII. Whether Our Soul is Rational.
That our soul is rational, one might demonstrate by many arguments. And first of all from the fact that it has discovered the arts that are for the service of our life. For no one could say that these arts were introduced casually and accidentally, as no one could prove them to be idle, and of no utility for our life. ”