Soma was one of the more important gods in the Rig Veda; 120 hymns and one entire book are dedicated to him. He has many different forms. He is seen as a celestial bull, a bird, a giant rising from the waters, the lord of plants, and as an embryo. He rarely is seen as a fully grown human.
As a drink, Soma is the ambrosia of the gods. It was due to this influence that they could rise above all obstacles to achieve their goals. Indra was a great drinker of the substance; before his confrontation with Vritra, he drank rivers of it to gain the strength needed to overcome the fearsome dragon. Agni also consumed it in large amounts. Soma was what gave the Vedic gods their immortality. It was also a drink for mortals, a golden-hued nectar which was derived from the Soma plant, which may be a species known as ephedra vulgaris to botanists. This drink brought hallucinations and ecstasy to those who consumed it. It helped warriors to overcome their fears in battle, and it helped poets to become inspired to create. Soma was a bridge between the mortal world and that of the gods. This drink is the same as Haoma in Persian mythology.
As the moon, Soma became equated with the god Chandra, who originally was the moon deity. The moon was considered the cup which held the drink Soma for the gods, and one reason that the moon waxed and waned was due to this fact. When the moon waned, it was because the gods were drinking down all the Soma; as it waxed, the god was re-creating himself, only to be consumed again once the cup was again full. As the Vedic age ended and the Brahmans asserted themselves, the power of the gods no longer came from Soma but instead from sacrifices made by humans; Soma came more and more to be just a god of the moon. In later times, the waxing and waning of the moon was due to a curse put on Soma. Soma had twenty-seven wives (who correspond to the twenty-seven stations of the moon). They were all the daughters of Daksha. Daksha felt that Soma was paying too much attention to one of his daughters, thereby neglecting the rest. He cursed Soma to die a withering death. But Soma's wives intervened, and so the death became only periodic; during half the month, the moon slowly dies away, but is reborn and comes around again to full vigor.
Though he is never depicted in human form, Soma obviously did not want for lovers; poets rarely do. In one episode, his desires caused a war. He had grown arrogant due to the glory that was offered him. Because of this, he let his lust overcome him; he kidnaped and carried off Tara, the wife of the god Brihaspati. After refusing to give her up, the gods made war on him to force her release, and Soma called on the asuras to aid him. Finally Brahma interceded and compelled Soma to let Tara go. But she was with child, and it ended up that this child was Soma's. The child was born and named Budha (not to be confused with the Buddha).