Earth, Pṛithivī, the Broad One, hardly ever dissociated from Dyaus, is celebrated alone in only one short hymn of three stanzas (v. 84). Even here the poet cannot refrain from introducing references to her heavenly spouse as he addresses the goddess,
Who, firmly fixt, the forest trees
With might supportest in the ground:
When from the lightning of thy cloud
The rain-floods of the sky pour down.
The personification is only rudimentary, the attributes of the goddess being chiefly those of the physical earth.
The most important of the terrestrial deities is Agni, god of fire. Next to Indra he is the most prominent of the Vedic gods, being celebrated in more than 200 hymns. It is only natural that the personification of the sacrificial fire, the centre around which the ritual poetry of the Veda moves, should engross so much of the attention of the Rishis. Agni being also the regular name of the element (Latin, igni-s), the anthropomorphism of the deity is but slight. The bodily parts of the god have a clear connection with the phenomena of terrestrial fire mainly in its sacrificial aspect. In allusion to the oblation of ghee cast in the fire, Agni is “butter-backed,” “butter-faced,” or “butter-haired.” He is also “flame-haired,” and has a tawny beard. He has sharp, shining, golden, or iron teeth and burning jaws. Mention is also often made of his tongue or tongues. He is frequently compared with or directly called a steed, being yoked to the pole of the rite in order to waft the sacrifice to the gods. He is also often likened to a bird, being winged and darting with rapid flight to the gods. He eats and chews the forest with sharp tooth. His lustre is like the rays of dawn or of the sun, and resembles the lightnings of the rain-cloud; but his track and his fellies are black, and his steeds make black furrows. Driven by the wind, he rushes through the wood. He invades the forests and shears the hairs of the earth, shaving it as a barber a beard. His flames are like the roaring waves of the sea. He bellows like a bull when he invades the forest trees; the birds are terrified at the noise when his grass-devouring sparks arise. Like the erector of a pillar, he supports the sky with his smoke; and one of his distinctive epithets is “smoke-bannered.” He is borne on a brilliant car, drawn by two or more steeds, which are ruddy or tawny and wind-impelled. He yokes them to summon the gods, for he is the charioteer of the sacrifice.
The poets love to dwell on his various births, forms, and abodes. They often refer to the daily generation of Agni by friction from the two fire-sticks. These are his parents, producing him as a new-born infant who is hard to catch. From the dry wood the god is born living; the child as soon as born devours his parents. The ten maidens said to produce him are the ten fingers used in twirling the upright fire-drill. Agni is called “Son of strength” because of the powerful friction necessary in kindling a flame. As the fire is lit every morning for the sacrifice, Agni is described as “waking at dawn.” Hence, too, he is the “youngest” of the gods; but he is also old, for he conducted the first sacrifice. Thus he comes to be paradoxically called both “ancient” and “very young” in the same passage.
Agni also springs from the aërial waters, and is often said to have been brought from heaven. Born on earth, in air, in heaven, Agni is frequently regarded as having a triple character. The gods made him threefold, his births are three, and he has three abodes or dwellings. “From heaven first Agni was born, the second time from us (i.e. men), thirdly in the waters.” This earliest Indian trinity is important as the basis of much of the mystical speculation of the Vedic age. It was probably the prototype not only of the later Rigvedic triad, Sun, Wind, Fire, spoken of as distributed in the three worlds, but also of the triad Sun, Indra, Fire, which, though not Rigvedic, is still ancient. It is most likely also the historical progenitor of the later Hindu trinity of Brahmā, Vishṇu, Çiva. This triad of fires may have suggested and would explain the division of a single sacrificial fire into the three which form an essential feature of the cult of the Brāhmaṇas.
Owing to the multiplicity of terrestrial fires, Agni is also said to have many births; for he abides in every family, house, or dwelling. Kindled in many spots, he is but one; scattered in many places, he is one and the same king. Other fires are attached to him as branches to a tree. He assumes various divine forms, and has many names; but in him are comprehended all the gods, whom he surrounds as a felly the spokes. Thus we find the speculations about Agni’s various forms leading to the monotheistic notion of a unity pervading the many manifestations of the divine.