I don't think there's such a thing as "unmediated experience of the world".
(I like the quotation a lot for giving a plausible, lucid reason why Zen might spurn the usual sort of analytical discourse. But it's so clear an explanation of an idea that I think it's revealed a basic problem with the idea, namely that it points towards a non-existent goal.)
Words are used to point to places. The thing that comes to your mind when you hear the words "unmediated experience of the world" might not exist. That doesn't mean that there aren't using people who use that phrase to point to something real.
Another month has passed and here is a new rationality quotes thread. The usual rules are: