Saint Cyril of Jerusalem had an exceptional education and was ordained a Bishop of Jerusalem during the Arian heresy. He instructed neophytes in the Catechism, explaining the Orthodox Catholic theology; this doctrine is still valuable today. He was exiled twice because of Arian followers, but returned in 378 to find Jerusalem torn in heresy, schism, and was crime-ridden. He worked hard to return it to the faith. At the Council of Constantinople, he championed orthodoxy, clarified that Christ has the same nature as the Father, and used the word “Consubstantial” in the Nicene Creed.
