Western Christianity. Western Christianity is a form of Christianity that comprises Roman Catholicism, Anglicanism (sometimes considered a part of Protestantism), and Protestantism. As opposed to Eastern Christianity, it developed and came to be predominant in Western Europe. Some of the principal respects in which Western Christianity differs from Eastern Christianity are Western Christianity’s doctrine of original sin; Most Western Christians use an amended version of the Nicene Creed that states that the Holy Spirit “proceeds from the Father and the Son” (considered heretical by most Eastern Christians, who use the Creed as originally promulgated by the Council of Nicaea, saying that the Holy Spirit “proceeds from the Father”); and the date of Easter, a major religious holiday.Eastern Christianity. Eastern Christianity refers collectively to the Christian traditions and churches which developed in Greece, Russia, the Balkans, Eastern Europe, Asia Minor, the Middle East, northeastern Africa and southern India over several centuries of religious antiquity. It is contrasted with the Western traditions of Christianity which descend through, or alongside that of, the Catholic Church’s Western church also known as the Latin Rite.
Arianism (Christianity). Arianism refers to the theological positions made famous by the theologian Arius (c. 250-336 CE), who lived and taught in Alexandria, Egypt, in the early 4th century. The controversial teachings of Arius dealt with the relationship between God the Father and the person of Jesus Christ, a relationship known as the doctrine of the Trinity. Arius taught that God the Father and the Son did not exist together eternally. Further, Arius taught that the pre-incarnate Jesus was a divine being created by (and possibly inferior to) the Father at some point, before which the Son did not exist. In English-language works, it is sometimes said that Arians believe that Jesus is or was a “creature”; in this context, the word is being used in its original sense of “created being”.