Original sentence: In the first few centuries of its existence, the Church defined and formed its teachings and traditions into a systematic whole under the influence of theological apologists such as Pope Clement I,  Ignatius of Antioch, Justin Martyr, and Augustine of Hippo
Edited sentence: In the first few centuries of its existence, the Church defined and formed its teachings and traditions into a systematic whole under the influence of theological apologists such as Pope Clement I, Saint Ignatius of Antioch, Saint Justin Martyr, and St Augustine