The Gathas alone within the Avesta make claim to be the ipsissima verba of the prophet; in the rest of that work they are put into Zoroaster's own mouth (Yasna, 9, 1) and are expressly called "the Gathas of the holy Zoroaster" (Yasna, 57, 8).
The litanies of the Yasna, and the Yashts, refer to him as a personage belonging to the past.
According to the Avesta (Yasna, 9, 17),, Airyanem Vaejo, on the river Daitya, the old sacred country of the gods, was the home of Zoroaster, and the scene of his.
On this point the Avesta is wholly silent: only one obscure passage (Yasna, 53, 9) seems to intimate that he found an ill reception in Rai.
Zoroaster says of himself that he had received from God a commission to purify religion (Yasna, 44, 9).