Didymus the Blind

Didymus the Blind (alternatively spelled Dedimus or Didymous) (c. 313 - 398) was a Christian theologian in the Church of Alexandria, whose famous Catechetical School he led for about half a century. Despite his impaired vision, his memory was so powerful that he mastered dialectics and geometry, subjects whose study usually benefits appreciably from sight.

Quotes

 * Being the source of goodness, God, even after our failures, calls us anew, not effacing entirely from our mind the knowledge of good, even if we have turned away from virtue through sin. This is what God, at present, also does for Adam in calling him although he has hidden himself, saying to him: 'Adam, where art thou?' Adam, in fact, had been placed there by God for the purpose of working and guarding Paradise; he had received this place from Him to be his own. Having distanced himself from there by disobedience, it is proper that he should hear from God: 'Where art thou?