This world has a good many of these demoniac natures, but there are some gods too. If one proposes to teach any science to increase the power of sense-enjoyment, one finds multitudes ready for it. If one undertakes to show the supreme goal, one finds few to listen to him. Very few have the power to grasp the higher, fewer still the patience to attain to it. But there are a few also who know that even if the body can be made to live for a thousand years, the result in the end will be the same. When the forces that hold it together go away, the body must fall. No man was ever born who could stop his body one moment from changing. Body is the name of a series of changes. "As in a river the masses of water are changing before you every moment, and new masses are coming, yet taking similar form, so is it with this body." Yet the body must be kept strong and healthy. It is the best instrument we have.