Your Head as a Cup of Tea

"There's an old analogy to a cup of tea. If you want to drink new tea you have to get rid of the old tea that's in your cup, otherwise your cup just overflows and you get a wet mess. You head is like that cup. It has a limited capacity and if you want to learn something about the world you should keep your head empty to learn it. It's very easy to spend your whole life swishing old tea around in your cup thinking it's great stuff because you've never really tried anything new, because you could never get it in, because the old stuff prevented its entry because you were so sure the old stuff was so good, because you never really tried anything new..........on and on in an endless circular pattern."

- from Lila by Robert Pirsig