" The complex interplay of the emotions, however, is far beyond the understanding of functional neuroanatomists. Where, for example, are the representations of the id, ego, and and the superego? Through what pathway are ethical and moral judgments shepherded? What processes allow beauty to be in the eye of the beholder? These philosophical questions represent a true frontier of human discovery. "

― , Kaplan & Sadock's Synopsis of Psychiatry: Behavioral Sciences/Clinical Psychiatry