The other night I was reading Italo Calvino's Six Memos for the Next Millennium (thank you, Alvin) and came across mention of emblems created to illustrate the Latin axiom "Festina lente" or, "hurry slowly" which sums up what I endeavor to do with my days. Calvino mentions the illustrations of Paolo Giovio, who represented the idea with a butterfly and a crab. A bit of searching came up with some other juxtapositions: dolphin + anchor, sail + turtle, rabbit + snail.