I think he is ultimately saying that you should be emotionally vulnerable, and you should read things that break through that inner barrier that we all put up.

I think he is ultimately saying that you should be emotionally vulnerable, and you should read things that break through that inner barrier that we all put up. Reading a good book is like making a connection, and becoming emotionally invested in that world and the ideas within it. Turning that last page and knowing that its all over can be a heart-wrenching experience as well. I know I've experienced this indescribable feeling of loss or even grief almost after reading a good book. That could also mean reading biographies of others lives, love stories, things that challenge your world view and things that are a little above our skill level. There is value in being willing to challenge your own beliefs (if they can't be challenged with a new understanding or new knowledge, then they aren't so much beliefs as they are a doctrine to be followed) and being willing to be emotionally vulnerable.