The illiterate is neither deaf nor blind. He is the one who has not learned to write and read.
Since nowadays even the blind and the deaf are able to read and listen through the modern methods of communication (sign language, language of the blind), it is obvious that no one can justify their illiteracy, their ignorance of communicating. There is no strong justification for the ignorance I have about the issues of everyday life and consequently also for the ignorance I have about the issues of my inner life, the life of my inner world.
Since we can all hear, read, reflect, listen to other opinions, and judge what is best, we can all choose the best out of the good and not just the good from the evil. This is the big challenge today. Can I, since I know how to read and write, learn more about how to strengthen my inner person, so that I can do what I want, and not do what I do not want to?
The creator has put the supplies inside us, has put the skills within your DNA up front. To me and you, all that remains is the responsibility to activate these mechanisms and skills so that we cease to be illiterate, without knowledge of our worth, slaves and not our own masters.