A Keen Learner

Didymus, Alexandrius, captus a parva aetate oculis, et ob id elementorum quoque ignarus, tantum miraculum sui omnibus praebuit, ut dialecticam quoque, et geometriam, quae vel maxime visu indiget, usque ad perfectum didicerit. Is plura opera et nobilia conscripit, commentarios in psalmos omnes, commentarios in Evangelium Matthaei et Joannis, et de Dogmatibus, et contra Arianos libros duos, et de Spiritu sancto librum unum, quem ego in Latinum verti, in Isaiam tomos decem et octo, in Osee, ad me scribens, commentariorum libros tres, et in Zachariam, meo rogatu, libros quinque, et commentarios in Job, et infinita alia quae digerere proprii indiciis est. Vivit usque hodie, et octogesimum tertium aetatis excessit annum. Sanctus Hieronymous, De Viris Illustribus, Caput CIX Source: Migne PL 23.705a

Didymus of Alexandria, afflicted by blindness of the eyes while very young, and because of this ignorant of the rudiments of learning, displayed such a miracle of intelligence in all things that even dialectics and geometry, studies which especially require sight, he learned perfectly. He wrote many admirable works: Commentaries on all the Psalms, Commentaries on the Gospels of Matthew and of John, On The Doctrines, two books Against the Arians, and one book On the Holy Spirit, which I have translated into Latin, eighteen volumes On Isaiah, three books of commentaries On Hosea, addressed to me, and five books On Zechariah, written at my asking, also commentaries On Job, and countless other things, which to set forth would be a work in itself. He is still living today, and has passed his eighty third year. Saint Jerome, On Illustrious Men, Chapter 109