"I am not worthy to be called Catholic if I cannot defend my faith." This punchy declaration is frequently shared by Catholic apologists across social media platforms like Facebook and TikTok. It is almost universally attributed to St. Cyril of Alexandria, the 5th-century Patriarch and Doctor of the Church. Because St. Cyril is famously remembered as a "Pillar of Faith" for his fierce defense of church dogma, modern internet creators likely attached this generic quote to him to lend it apostolic weight and authority. However, historical and textual evidence reveals that this quote is an outright misattribution. The Absence of Evidence There is no primary source document, letter, or homily from the early Church that contains this sentence. A thorough search of St. Cyril’s massive bibliography—including his commentaries, treatises on the Trinity, and letters defending Mary as the Theotokos (God-bearer)—yields no results. Furthermore, some online spaces try to credit S...