Intellect

The part or faculty of the human soul by which it knows, as distinguished from the power to feel and to will; sometimes, the capacity for higher forms of knowledge, as distinguished from the power to perceive objects in their relations; the power to judge and comprehend; the thinking faculty; the understanding.

the capacity for rational thought or inference or discrimination; "we are told that man is endowed with reason and capable of distinguishing good from evil"

knowledge and intellectual ability; "he reads to improve his mind"; "he has a keen intellect"