Within the hindu trinity of Brahma, Vishnu and Shiva, Brahma is the creator, Vishnu the preserver and Shiva the destroyer. Nevertheless, Brahma grew in a lotus out of the navel of the sleeping Vishnu. The daily alternation of light and dark is attributed to the activity of Brahma. Brahma's mind born sons are the seers Marici, Atri, Angiras, Pulastya, Pulaha, Kratuj, Pracetas, Vashishta, Bhrgu and Narada. From Brahma's body came his nine sons Daksa, Dharma, Kama, Anger, Greed, Delusion (Maya), Lust, Joy, Death and Bharata and one daughter called Angaja. In order to create the world and produce the human race, Brahma made a goddess out of himself. One half was woman and the other half was man. Brahma called the woman Gayatri, but she also became known by many other names such as Saraswati. Brahma has four heads, but used to have five. The four extra heads appeared when Gayatri was very ashamed with Brahma's love for her and tried to escape from his gaze. The tremendous tapas that Brahma had practiced for the purpose of creation was entirely annihilated through his desire to unite with his daughter. One head was lost later when Brahma lied to Vishnu and thus caused Shiva to become very angry. The four Veda's are said to have sprung from his heads. In the Life of Ganga, Brahma advised Bhagiratha to ask the help of Shiva in containing the power of Ganga (goddess of the Ganges river).