'We do have biological LIVE and DIE mechanisms within us . . . the state of mind changes the state of the body by working through the central nervous system, the endocrine system and the immune system. Exceptional patients manifest the will to live in its most potent form . . . ' writes Dr Bernie Siegel. Through the healing power of love, patients who have come under his care have learned to change, enrich and often prolong their lives far beyond scientific and medical expectation.