Priest Explains: All Catholics are Christian … but not all Christians are Catholic.

The early Church Fathers describe the Church as Catholic. In the writings of St. Ignatius of Antioch (110 A.D.), the word “Catholic” is used to distinguish the Church of Jesus Christ, from heretical (non-Christian) teachings. Ignatius was the first to document the term “Catholic” in its current form, to describe the Universal Church. In the 4th Century, the Catholic Church defined the “Trinity” and fought against the heresy of “Arianism”, which stated that Jesus was not “fully God” and not “fully human.”

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