Similarly, our body is also made in that way: earth, water, fire, air and ether. Air... Air is passing, the breathing. You know. The air is always there. This, this outer skin is earth, and there is heat in the stomach. Without heat, you cannot digest anything. You see? As soon as the heat is diminished, your digesting power becomes bad. So many things. This is arrangement. Now, in this planet we have got this body which is where earth is very prominent. Similarly, in other planets, other planets, somewhere water is very prominent, somewhere fire is very prominent. In the sun planet, the bodies there... There are also living entities, but their body is so made that it is fiery. They can exist in the fire. They can exist in the fire. Similarly, Varuṇaloka, in the Venus, all these planets, they have got different types of body. Just like here you can experience that in the water the aquatics, they have got a different type of body. For years and years together there are aquatic animals, they are within the water. They are very comfortable. But the moment you'll drag it to the land, it dies. Similarly, you are very comfortable on the land, but the moment you are put into the water, you die. Because your body, bodily construction is different, his body, the bodily construction different, the bird's bodily... The bird, heavy bird, it can fly, but it is God's made flying instrument. But your man-made instrument, it crashes, crashes. You see? Because artificial.
So this is the arrangement. Every living being has got a particular type of body. Dehino 'smin yathā dehe (BG 2.13). And what is the nature of that body? Now, here the matter is being explained that how we change our body, how... But, but, but, because that is a difficult problem for us because we are engrossed with the idea of identifying this body with the soul. Now, the first A-B-C-D of spiritual knowledge is to understand that "I am not this body." Unless one is firmly convinced that "I am not this body," he cannot progress in the spiritual line.