The body of the mind is as sufficient and even more concrete than the body we have in the physical world, for the reason that the physical body is very limited and subject to death and decay. The body of the mind which is ethereal lasts long, being less dependent upon food and water; it is maintained more by breath than by anything else. We are maintained even in this physical world chiefly by breath, although we recognize bread and water and other food as our sustenance. If we only knew that bread and water are not even a hundredth part of our sustenance compared with what breath does in our life! We cannot exist five minutes without breath; we can be without food for some days.