Friedrich Nietzsche

book I heard a very fine performance of _Carmen_; what glorious music!

However, at the risk of exciting your wrath I confess that Wagner's _Tristan und Isolde_ made an indelible impression on me. I once heard this opera in Berlin, in a despondent, altogether shattered state of mind, and I felt every note. I do not know whether the impression was so deep because I was so ill.