Christology

===First Council of Nicaea (325) and First Council of Constantinople (381)===
In 325, the [[First Council of Nicaea]] defined the persons of the [[Godhead (Christianity)|Godhead]] and their relationship with one another, decisions which were ratified at the [[First Council of Constantinople]] in 381. The language used was that the one God exists in three persons (Father, Son, and Holy Spirit); in particular, it was affirmed that the Son was ''[[homoousios]]'' (of the same being) as the Father. The [[Nicene Creed]] declared the full divinity and full humanity of Jesus.<ref>Jonathan Kirsch, ''God Against the Gods: The History of the War Between Monotheism and Polytheism'' (2004)</ref><ref>Charles Freeman, ''The Closing of the Western Mind: The Rise of Faith and the Fall of Reason'' (2002)</ref><ref>[[Edward Gibbon]], ''The Decline and Fall of the Roman Empire'' (1776–1788), p. 21</ref> After the [[First Council of Nicaea]] in 325 the ''Logos'' and the second Person of the [[Holy Trinity|Trinity]] were being used interchangeably.<ref>''A concise dictionary of theology'' by [[Gerald O'Collins]] 2004 {{ISBN|0-567-08354-3}} pp. 144–145</ref>