Who Agni is
Agni is fire, and the Rigveda never lets you forget that he is also a person. He is the flame on the altar and the flame in the kitchen. The poets find him in the lightning and in the sun as well. The very first hymn of the Rigveda is addressed to him.
He has a job that no other god can do. The gods live in heaven and people live on earth, and something has to carry the offerings from one to the other. Whatever is poured into the fire, Agni takes up in his smoke and delivers. For this reason the hymns call him the priest of the gods, their messenger and their mouth. Only Indra has more hymns in the Rigveda, and every one of its old family books opens with hymns to Agni.
The poets say he is born three times: in heaven, among men, and in the waters. Among men he is born whenever two sticks of wood are rubbed together until a spark jumps. One hymn calls him the lord of the house, and he lives in every home that keeps a fire.
He is not always willing. One of the best-loved Vedic stories tells how he ran away from his work and hid in the water, and how the gods had to coax him back. Another tells how a king carried him east across north India in his own mouth.
Agni is the messenger between earth and heaven.