This last is the receptacle of food. It lives on earthly food, and if it is starved of that, it dies. For it is made of earth; it lives on earth. The other is the receptacle of ether, which is called Pranamayakosh. That part of man's being lives by breath and by taking in the air, and if it is starved of air, it cannot live. These two bodies form the material part, the physical part, of man's being. And it is these two receptacles which are referred to in the legend as the two sons-in-law.