Alexander can't say he wasn't warned. His predecessor as bishop of Alexandria, Peter, had told him not to trust Arius. But Alexander ignored the advice. Then Arius went into open rebellion, and then his heresy spread throughout the world. And then Alexander had to act decisively, arguing strongly against the Arian heresy and prevailing at the Council of Nicaea in 325.

Links

St. Alexander of Alexandria, Letter to the Bishop of Constantinople https://www.catholicculture.org/culture/library/fathers/view.cfm?recnum=1823

St. Alexander of Alexandria, Encyclical Letter https://www.catholicculture.org/culture/library/fathers/view.cfm?recnum=1824

More works by the Fathers https://www.catholicculture.org/culture/library/fathers/

Mike Aquilina's website https://fathersofthechurch.com

Theme music: Gaudeamus (Introit for the Feast of All Saints), sung by Jeff Ostrowski. Courtesy of Corpus Christi Watershed http://www.ccwatershed.org.

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