We find that there are three principal variations among the Vedantists. On one point they all agree, and that is that they all believe in God. All these Vedantists also believe the Vedas to be the revealed word of God, not exactly in the same sense, perhaps, as the Christians or the Mohammedans believe, but in a very peculiar sense. Their idea is that the Vedas are an expression of the knowledge of God, and as God is eternal, His knowledge is eternally with Him, and so are the Vedas eternal. There is another common ground of belief: that of creation in cycles, that the whole of creation appears and disappears; that it is projected and becomes grosser and grosser, and at the end of an incalculable period of time it becomes finer and finer, when it dissolves and subsides, and then comes a period of rest. Again it: begins to appear and goes through the same process. They postulate the existence of a material which they call Âkâsha, which is something like the ether of the scientists, and a power which they call Prâna. About; this Prana they declare that by its vibration the universe is produced. When a cycle ends, all this manifestation of nature becomes finer and finer and dissolves into that Akasha which cannot be seen or felt, yet out of which everything is manufactured.