Somewhere over the rainbow is a land?

Bumped out a funny sentence from my mouth this evening in a conversation with an academic English course co-student: "I don't know if there is any use of studying it again." ("it" meaning statistics). But on the other hand, what's the use of not dreaming of the other end of the rainbow. And this is not anything to do with religion, not even with love. But with the feeling that life happens, and it's no use to explain all the things so rationally. And what's the use of anything, by the way and anyhow.