It’s a rare and valuable experience when a performance makes one reconsider a perhaps overly familiar work. That’s the effect that Claus Guth’s 2009 staging of Handel’s Messiah had on me. I don’t think that there is any piece I’m more familiar with than Messiah. I feel like I’ve known it all my life. I’ve sung it. I own a vocal score (rare indeed for me!). I couldn’t begin to count how many times I’ve heard it. And yet here it came up entirely fresh and had me thinking about it in completely new ways.