Natural knowledge is that which the soul can acquire through the use of its natural faculties and powers when investigating creation and the cause of creation -- in so far, of course, as this is possible for a soul bound to matter… Supranatural knowledge, on the other hand, is that which enters the intellect in a manner transcending its own means and power; that is to say, the intelligible objects that constitute such knowledge surpass the capacity of an intellect joined to a body, so that a knowledge of them pertains naturally only to an intellect which is free from the body. Such knowledge is infused by God alone when He finds an intellect purified of all material attachment and inspired by divine love.

(The Philokalia)