The Quran is a book that many read regularly, yet hardly any of them actually read it.
I am talking quite specifically about the word reading, as suppose to the words "making noise". When you read a piece of text, a book, an article, or anything such as a newspaper etc; when "reading" you understand what you are reading, you read with the correct expression, the correct attitude and focus for the material in question; this means that you have read that piece of text. The Quran however is not read, people just make noises that they do not even understand. The reason for this is explained in the Quran, that they have left the path of Allah, they have taken the path of shaitan, into kufr. They have become deaf, they cannot hear what they are reading. They have become dumb, they cannot read what they are reading. They have become blind, they cannot see what they are reading. The kalam of Allah has become a noise for them, a noise which has to be interpreted through means of other unintelligable noises, as well as the Roman philosophical schools of curruption. "Schools" does not mean education centres, it means gatherings, e.g. "a school of whales", "a pack of wolves" etc.
See Quran, Surah 2, ayahs 170 and 171.