Spock: “There’s something disquieting about these creatures.”
McCoy: “Don’t tell me you’ve got a feeling.”
Spock: “Don’t be insulting, doctor.  They remind me of lilies of the field.  They toil not, neither do they spin, but 
    they seem to eat a great deal.  I see no practical use for them.”
McCoy: “Does everything have to have a practical use for you?  They’re nice, soft, and furry, and they make a 
    pleasant sound.”
Spock: “So would an ermine violin, but I see no advantage in having one.”

from “The Trouble With Tribbles” (Star Trek, Season 2, Episode 15)

Ermine was premiered by Graeme Jennings on March 1st, 2013 at Northwestern University's Vail Chapel.