Not only does Agni tend to be regarded as more than one: he is identified with other gods. We are told he is Varuṇa and Mitra, Savitri and Indra. "Thou art Varuṇa when born," says one hymn, "thou becomest Mitra when kindled. In thee, O son of strength, are all the gods[147]." Such identifications are common in the Vedas. Philosophically, they are an early manifestation of the mental bias which leads to pantheism, metempsychosis, and the feeling that all things and persons are transitory and partial aspects of the one reality. But evidently the mutability of the Vedic gods is also due to their nature: they are bundles of epithets and functions without much personal or local centre. And these epithets and functions are to a large extent, the same. All the gods are bright and swift and helpful: all love sacrifices and bestow wealth, sons and cows. A figure like Agni enables us to understand the many-sided, inconsistent presentment of Siva and Vishnu in later times. A richer mythology surrounds them but in the fluidity of their outline, their mutability and their readiness to absorb or become all other deities they follow the old lines. Even a deity like Gaṇeśa who seems at first sight modern and definite illustrates these ancient characteristics. He has one or five heads and from four to sixteen arms: there are half a dozen strange stories of his birth and wonderful allegories describing his adventures. Yet he is also identified with all the Gods and declared to be the creator, preserver and destroyer of the Universe, nay the Supreme Spirit itself[148]. In Soma, the sacred plant whose juice was offered in the most solemn sacrifices, we again find the combination of natural phenomena and divinity with hardly any personification. Soma is not a sacred tree inhabited by some spirit of the woods but the Lord of immortality who can place his worshippers in the land of eternal life and light. Some of the finest and most spiritual of the Vedic hymns are addressed to him and yet it is hard to say whether they are addressed to a person or a beverage. The personification is not much more than when French writers call absinthe "La fée aux yeux verts." Later, Soma was identified with the moon, perhaps because the juice was bright and shining. On the other hand Soma worship is connected with a very ancient but persistent form of animism, for the Vedic poets celebrate as immortal the stones under which the plant is pressed and beg them to bestow wealth and children. Just so at the present day agricultural and other implements receive the salutations and prayers of those who use them. They are not gods in any ordinary sense but they are potent forces.