You caught my attention with that one: it sounded like a cuckoo quote. I don't think of Wittgenstein and silliness as exactly hanging out together. However, it

You caught my attention with that one: it sounded like a cuckoo quote. I don't think of Wittgenstein and silliness as exactly hanging out together. However, it turns out to be genuine and there's a related one to boot: Never stay up on the barren heights of cleverness, but come down into the green valleys of silliness. (http://en.wikiquote.org/wiki/Ludwig_Wittgenstein http://en.wikiquote.org/wiki/Ludwig_Wittgenstein)