The number 5 gathered from the brook is the count of the senses drawn up out of the flowing waters of the body and made smooth, worn round by long use until they are fit weapons. The small shepherd faces the giant of gross flesh not with armor but with these 5 refined faculties, one of which, flung true, drops the whole mass of the lower man. The staff is the spine held upright, the axis of the standing self, and the sling is focused thought that hurls a single point of awareness with force.
The giant is beaten by the small and inward, the concentrated sense-mind striking the forehead of appetite that towered over it.
5 smooth stones: the 5 senses drawn from the body's stream and worn round, refined into weapons that strike the lower nature
Brook: the flowing water of the body from which the senses are gathered up and purified
Staff: the upright spine, the standing axis of the self held in the hand
Sling: focused thought that hurls a single point of concentrated awareness at the giant of the flesh
The Philistine giant: the towering mass of gross appetite and animal body that overshadows the small inner self