Didymus the Blind was a 4th-century Christian theologian and presbyter based in Alexandria. Having lost his sight at the age of four, he relied on an exceptional memory to pursue deep scholarship, even experimenting with carved wooden letters to facilitate reading. As a dedicated student of Origen, he taught for approximately fifty years, influencing notable figures such as Jerome and Rufinus. Although he remained a layman, his intellectual contributions to the Alexandrian theological tradition were profound, and he was highly regarded for his mastery of scripture and his defense of Nicene orthodoxy.