In this passage Schopenhauer claims that learning by reading can limit one’s opinion while being a free thinker will open up one’s opinion which is better for “developing the world”. I believe in some ways Schopenhauer was correct, but reading books can sometimes open up the mind. For me, reading books can make me look at things in a different way. On the other hand occasionally it is better for me to be able to have time to myself in order to fully understand something.