Now, the question may be asked, why these four upper heavens are not destroyed, and how can there be an ocean of water When the Water Element is destroyed along with the other Elements? The answer is very interesting and instructive. There are two kinds or states of these Five Elements—Ether, Air, Fire, Water, Earth. One may be called Pure and the other Mixed. The Pure state of an Element means wholly unmixed by even the least touch or tinge of the other four elements. A mixed Element is made up of half part of one Element mixed with one-eighth part of each of the other four Elements. The Bhur, Bhuba and Swar are made of these five Mixed Elements which being destroyed by this Kalpa Pralaya, the three spheres are necessarily destroyed too. The Upper four spheres are made of the Unmixed Elements and hence they survive the Kalpa dissolution of the Mixed Elements. It is needless to say that dwellers of these upper realms are possessed of a physical body made of these Five Pure Elements, and in the highest realms the dwellers have no physical bodies at all and therefore no elements in their make-up. The bodies of some of them are formed of the Five Finest essences of the Elements—Sound, Touch, Form, Taste and Smell; and of others, the highest beings in the Brahmā Loka, of nothing but Consciousness and Ego and Ensouled Mind. The water of the Watery Expanse, into which the lower three spheres are reduced by the Kalpa Pralaya, is this Unmixed Pure Water, which is invisible to our ordinary physical eye. The world is indebted to the Immortal Mārkandeya for a description of what remains after this Kalpa dissolution. Blessed, then, with the finest and purest Element-body, he alone hovers over this vast Watery Expanse. His experiences are recorded in that History of the Universe, the Mahābhārata, of which here are a few details: Said Mārkandeya: "O King! In this, time of the Kalpa Pralaya, when all gods, asuras, elements, demons, men, animals, trees and the firmament, etc., all, all the mobile and immobile beings and objects, will be dissolved into one vast ocean, I alone will hover over that endless expanse of water and become sad-hearted on viewing this general destruction. After floating on it for a very long period of time I will feel extremely exhausted. Then, shortly after, a huge tree in the midst of that one-ocean will attract my eye. O King! Resting on the spreading boughs of that tree I will see seated on a couch of glory a lotus-eyed Boy with a face radiant like the light of the full moon. Instantly on seeing him I shall be extremely astonished and will say within myself 'How wonderful! Everything has been destroyed, how then is this boy resting here?' O Great King! Although I am blessed with the knowledge of the past, present and future, I shall fail to know who that child may be.