This week the Church celebrates two of the year's greatest feasts: on November 1, All Saints; and on November 2 All Souls. All Souls in particular is a poignant commemoration, as we pause to remember friends, relatives, loved ones; those deceased souls who have no feast day of their own, no moment in which they are remembered by all, but as one philosopher put it, those "known only to God." It's a perfect occasion to meditate on Verdi's Requiem, which although not an opera, is often categorized in the operatic canon because of its length and style. Here is the beginning - the Kyrie, containing some of the most lovely music Verdi ever composed. It's performed by the Vienna Symphony and the Friends of Music Choral Society of Vienna, and conducted by Herbert von Karajan.