"Our primary source of energy in this system is the sun. But in general, the human being in his present state of evolution, has not developed the ability to make direct use of the sun's energy; you cannot 'eat sunlight' except in limited ways. When humanity does develop this ability, the digestive organs will become vestigial and the laxative companies will go out of business. For now, food is the form of stored sunlight which you need. A proper diet allows you to make the most direct use of the sun's energy. The ensuing store of energy will open your senses, expand your awareness, and sharpen your concentration into a slashing blade"

Staying healthy