No

the world is evolving and life is too short to limit oneself to being wrapped in a familiar cocoon. you need to allow yourself to be exposed to new ideas or even new approachs to old ideas. that is not to say that you should never re-read, just that you should not become trapped in the old at the expense of the new. taken to its extreme, the re-reading argument would suggest that once you have read a certain number of books, you never need read a new book for the rest of your life.

Scott

Brooklyn, NY