Shiva has neither origin nor end. He is the supreme creator of the universe.

Shiva has neither origin nor end. He is the supreme creator of the universe. He is the only one to be above the bondage of life and death and past present and future. He is the controller of time. He is root and cause of universe still is inert and inactive. Long before anything existed there was darkness, complete and omnipresent darkness. Then Shiva thought of universe.

Universe needed a force to run it and somebody to manage it. Shiva separated his Shakti (power) from himself and started the creation. Shiva and Shakti created Vishnu to manage the universe. Lord Vishnu created Brahma whom he entrusted with the job of Creation. Vishnu himself became preserver. Then Lord Shiva incarnated as Rudra to act as the Destructor. Thus the Triad was formed to handle Creation, Perseverance and Destruction which formed a cycle. Shiva decided the life of the entire universe including Triad.

The Life span of universe is termed as “Kalp-Chakra” the largest measure of time known to world. (Of late science calculated the average life span of universe which is very close the Kalp-Chakra). At the end of a Kalpa, Shiva disposes the entire creation and starts the re-construction of it which invariably starts with the constitution of the Triad.
Shiva, the supreme creator is formless and is pronounced by universal syllable Om Aum ॐ