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The cosmos follows one cycle within a framework of cycles. It may have been created and reach an end, but it represents only one turn in the perpetual kalachakra, "wheel of time", which revolves infinitely through successive cycles of manifestation and dissolution. Within this cycle of manifestation and dissolution of the universe, the atman (the Self) also undergoes its own version of cycle called samsara, the cycle of rebirth in which individual Self are repeatedly reincarnated.
For the srishti (creations) of anything three causes are required to be fulfilled: Material cause, instrumental cause and supporting cause. In Creation, Brahman is all of these three causes. He evolves Himself into Mulaprakriti or primordial matter.
There are two types of srishti (creations), samashti srishti, aggregate creation and vyashti srishti, individual creation — the creation of mahat out of prakriti, of ahankara and the 10 indriyas of knowledge and karma, of panchabhutas and subtle elements. All these are called aggregate creation. This is how the world or the universe was created. The further creation of human beings, animals, trees and plants is called individual creation.