We all build internal sea walls to keep at bay the sadnesses of life and the often overwhelming forces within our minds. In whatever way we do this--through love, work, family, faith, friends, denial, alcohol, drugs, or medication--we build these walls, stone by stone, over a lifetime. One of the most difficult problems is to construct these barriers of such a height and strength that one has a true harbor, a sanctuary away from crippling turmoil and pain, but yet low enough, and permeable enough, to let in fresh seawater that will fend off the inevitable inclination toward brackishness.