Light: Medicine of The Future:

How can America's health-care system be transformed to provide consistently higher-quality and lower-cost care? Nothing else in health care matters more.

For much of recorded history, people considered the heart to be the most important organ in the body. In cultures around the world, the heart—not the brain—was believed to be the location of intelligence, memory, emotion, and the soul. Over time, views on the purpose of the heart have transformed as people sought to understand the life forces it contains. Modern medicine and science dismissed what was once the king of the organs as a mere blood pump subservient to the brain, yet the heart remains a potent symbol of love and health and an important part of our cultural iconography.