Beethoven's Piano Sonata No. 14. - aka "Moonlight".
I have to take a breath, lean my head back and feel a rush of tingling emotion. A reassuring familiarity and yet still with the capacity to freeze me in the moment. It's a sudden appearance of a beloved friend, if that's not too much hyperbole.
Then I carry on with what I'm doing, but I am properly listening to the music now, relishing its company.
I can't tell you why, but that's what it does to me.
I'd love to know if anyone else has that experience, and what piece of music evokes it.
Illustration from stock.xchng