Athanasius
Rarely in the history of the Church has the course of its development been more significantly determined by one person than it was by Athanasius in the fourth century. Gregory of Nazianzus called him “the pillar of the Church,” and Basil the Great said he was “the God-given physician of her wounds.” Athanasius was born about 295 in Alexandria, and was ordained deacon in 319. He quickly attracted attention by his opposition to the presbyter Arius, whose denial of the full divinity of the Second Person of the Trinity was gaining widespread acceptance. Alexander, the Bishop of Alexandria, took Athanasius as his secretary and advisor to the first Ecumenical Council, at Nicaea in 325, which dealt with the Arian conflict.