Ancient Iranian religion was strongly connected. Beginning in the early 10th-century BC, the ancient Iranian religion was gradually displaced by Zoroastrianism, which contains many essential aspects of its predecessor. The sources on ancient Iranian religion, though limited, consist of textual and material sources. The textual sources are both Iranian and non-Iranian. An important Iranian source is the Avesta, which are Zoroastrian sacred scriptures made in the Avestan. This is considered the principal source of knowledge on ancient Iranian religions. It is a collection of several texts that seems to have been over a large span of time by a variety of authors. These
Self religion to trends in the late modern/early postmodern transition, which encompass much more than simply New Age and Neo-pagan religiosities." Eileen Barker, in her 1999 book " New Religious Movements: their incidence and significance", said that they were "toward the New Age end of the NRM spectrum". Massimo Introvigne, an Italian sociologist of religion, describe "self religion" as "a deep but vague and unorganized interest in the sacred". Groups characterized as (or associated with the concepts of) self religions or "religions of the True Self" include: Self religion A self religion (or self-religion) is a religious or self-improvement group which has