I went last night with my family to hear a performance of Mozart's Requiem, featuring the Mendelssohn choir.

The performance was just great. I noticed that my anxiety was pretty high when we arrived, so I allowed myself to get lost in the music and my anxiety reduced.

The music has a very dark tone, and I felt Mozart's desperation to try to finish the composition before he died. But at the same time, the music is very hopeful and forward looking, especially the parts from the choir.

If you're interested, here's a YouTube from another performance which is also very good...