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
Gleanings from the Writings of Bahá'u'lláh Gleanings from the Writings of Bahá'u'lláh Gleanings from the Writings of Bahá'u'lláh is a compilation of selected tablets and extracts from tablets by Bahá'u'lláh, the founder of the Bahá'í Faith. Shoghi Effendi, Guardian of the Bahá'í Faith from 1921 to 1957, made the selection and performed the translation, which was first published 1935. The work consists of "a selection of the most characteristic and hitherto unpublished passages from the outstanding works of the Author of the Bahá'í Revelation," according to Shoghi Effendi. The passages come from the whole range of Bahá'u'lláh's writings, dated from about 1853 to 1892. The book