Well, the song is "The Cockeyed Optimist" from "South Pacific." I went to my usual source for lyrics from musicals, and found that the Rodgers and Hammerstein organization had forced the site to shut down. Mary Martin (Nurse Nellie Forbush) sang the song on Broadway. There's a very nice recording of the song on the Julie Andrews album called "Broadway - the Music of Richard Rodgers."
I guess since this is a folk music site and sicne the Rodgers and Hammerstein folks are known to be particularly nasty, I'd better not post the lyrics here. Expect an e-mail.
-Joe Offer-