I knew I liked these guys. My life verse is Romans 12:21 "Be not overcome by evil, but overcome evil with good." The LvMI official motto is 'Tu ne cede malis sed contra audentior ito,' (Virgil's Aeneid); the motto means "do not give in to evil but proceed ever more boldly against it." Early in his life, Mises chose this sentence to be his guiding principle in life.
This sticker in Latin is a little obscure, but if it starts a conversation or two, and you can follow it up with the extended quote, and tie it into the Two Laws and get someone interested in Liberty, then it is well worth it.