Shiva is one of the gods of the Trinity. He is said to be the god of destruction. The other two gods are Brahma, the god of creation and Vishnu, the god of maintenance. The three gods represent the three fundamental powers of nature which are manifest in the world viz. creation, destruction and maintenance. These powers exist perpetually. Creation is going on all the time. So is destruction and maintenance. All three powers are manifest at all times. They are inseparable. Creation and destruction are like two sides of a coin. And maintenance is an integral part of the processes of creation and destruction. For example, morning dies to give birth to noon. Noon dies when night is born. In this chain of birth and death the day is maintained. To indicate that these three processes are one and the same the three gods are combined in one form of Lord Dattatreya. Lord Dattatreya has the faces of Brahma, Vishnu and Shiva.