Avesta other general. The following categorization is as described by Jean Kellens (see bibliography, below). The "Yasna" (from "yazišn" "worship, oblations", cognate with Sanskrit "yajña"), is the primary liturgical collection, named after the ceremony at which it is recited. It consists of 72 sections called the "Ha-iti" or "Ha". The 72 threads of lamb's wool in the "Kushti", the sacred thread worn by Zoroastrians, represent these sections. The central portion of the Yasna is the "Gathas", the oldest and most sacred portion of the Avesta, believed to have been composed by Zarathushtra (Zoroaster) himself. The "Gathas" are structurally interrupted by the
Mehrdad Avesta and history of arts at the University of Tehran. He married two times in 1954 and 1966 and he had one son and three daughters. Avesta died in his office at Vahdat Hall of Tehran while he was editing a poem work. Mehrdad Avesta was born in 1929, in Borujerd. Born to a family of artistic history, he was also greatly interested in art, so he started writing poems from early ages, which were also published. He got his degree in Theology, and then studied philosophy. Along his formal education, he started working as a teacher. Besides, he served in