The embodiment of the power of Brahma, Vishnu and Shiva, she rides a bull and carries a trident and a lotus in her two hands. In previous birth, she was daughter of Daksha, Sati. Once Daksha had organized a big Yagna and did not invite Shiva. But Sati being obstinate, reached there. Thereupon Daksha insulted Shiva. Sati could not tolerate the insult of husband and burnt herself in the fire of Yagna. In other birth, she became the daughter of Himalaya in the name of Parvati - Hemavati and married Shiva. As per Upanishad, she had torn and the egotism of Indra, etc. Devtas. Being ashamed they bowed and prayed that, In fact, thou are Shakti, we all - Brahma, Vishnu and Shiva are capable by getting Shakti from you.