An illiterate person has a much better chance of achieving total freedom because he's not clogged by accrued, accumulated encrustations of dogma, doctrine, education, ideas. The less ideas we have, the less education we have, the less demand we have to behave in accordance with the world, and therefore we're freer to dive into ourselves. The less cobwebs we have in the way of seeing ourselves the less we accept from society, because society is very much in the wrong direction. So anything it gives us becomes an obstacle.