You may have enemies whom you hate, but not enemies whom you despise. You must be proud of your enemy: then the success of your enemy shall be your success too.
Source: Thus Spoke Zarathustra, pt. 1, Of War and Warriors (1883-92; tr. 1961).
-- Friedrich Nietzsche, (Oct 15 1844-1900), German philosopher, poet; He was a noted critic of Christianity, conformism and nationalism who wrote The Birth of Tragedy, 1872.