It is obvious that teaching is a very special art, sharing with only two other arts, agriculture and medicine, an exceptionally important characteris… - Mortimer J. Adler

The books to be read should not be limited to those written in English.... Instead it should be devoted to the great works of history, biography, philosophy, theology, natural science, social science, and mathematics, as well as the... tradition of Western literature -- in English translation... Its aim should not be a survey of Western civilization, but an effort to understand the basic ideas and issues in Western thought.

To avoid this error, the error of assuming that that to be widely read and to be well read are the same thing, we must consider a certain distinction in types of learning. ... In the history of education, men have often distinguished between learning by instruction and learning by discovery. ... Discovery stands to instruction as learning without a teacher stands to learning through the help of one. In both cases the activity of learning goes on in the one who learns. It would be a mistake to suppose that discovery is active learning, and instruction passive. There is no inactive learning, just as there is no inactive reading. This is so true, in fact, that a better way to make the distinction clear is to call instruction “aided discovery.”

It is only by struggling with difficult books, books over one's head, that anyone learns to read.