The celebrated patriarch of Alexandria was born in that city about 296. At the council of Nice, though then but a deacon of Alexandria, his reputation for skill in controversy gained him an honorable place in the council, and with signal ability he exposed the sophistry of those who pleaded on the side of Arius. Six months after, he was appointed the successor of Alexander. Notwithstanding the influence of the emperor, who had recalled Arius from banishment, and, upon a plausible confession of his faith, in which he affected to be Orthodox in his sentiments, directed that he should be received by the Alexandrian church, Athanasius refused to admit him to communion, and exposed his prevarication. The Arians upon this exerted themselves to raise tumults at Alexandria, and to injure the character of Athanasius with the emperor, who was prevailed upon by falsehoods to pronounce against him a sentence of banishment. In the beginning of the reign of Constantius, he was recalled to his happy people, but was again disturbed and deposed through the influence of the Arians. Accusations were also sent against him and other bishops from the east to the west; but they were acquitted by Pope Julius in full council. Athanasius was restored a second time to his see, upon the death of the Arian bishop, who had been placed in it. Arianism, however, being in favor at court, he was condemned by a council convened at Arles, and by another at Milan, and was a third time obliged to fly into the deserts. His enemies pursued him even here, and set a price upon his head. In this situation, Athanasius composed writings full of eloquence to strengthen the faith of believers, and expose the falsehood of his enemies. He returned with the other bishops whom Julian the Apostate recalled from banishment, and, in A. D.362, held a council at Alexandria, where the belief of a consubstantial Trinity was openly professed. Many now were recovered from Arianism, and brought to subscribe the Nicene creed. But his peace was again interrupted by the complaints of the heathen, whose temples the zeal of Athanasius kept always empty. He was again obliged to fly to save his life. The accession of Jovian brought him back. During the reign of Jovian, also, Athanasius held another council, which declared its adherence to the Nicene faith; and with the exception of a short retirement under Valens, he was permitted to sit down in quiet and govern his affectionate church of Alexandria, until his death, in 373. Of the forty-six years of his official life, he spent twenty in banishment.

Athanasius (says the Encyclopedia Americana) is one of the greatest men of whom the church can boast. His deep mind, his noble heart, his invincible courage, his living faith, his unbounded benevolence, sincere humility, lofty eloquence, and strictly virtuous life, gained the honor and love of all. In all his writings, his style is distinguished for clearness and moderation.