The first step to self-knowledge is to know that thou art composed of an
outward shape, called the body, and an inward entity called the heart, or
soul. By "heart" I do not mean the piece of flesh situated in the left of
our bodies, but that which uses all the other faculties as its instruments
and servants. In truth it does not belong to the visible world, but to the
invisible, and has come into this world as a traveler visits a foreign
country for the sake of merchandise, and will presently return to its
native land. It is the knowledge of this entity and its attributes which is