Setting for a long session of grading and responding to students end-of-semeseter anguish, I turned to Philip Glass's performance of "Mad Rush" in Montreal (www.youtube.com/watch?v=8Q0G0-9E5SE). In the comments echo_delta wrote: "Somebody's soul is invisible, but sometimes you can hear it.", a phrase I hope to remember.
For some though, you can feel it.