I’ve observed in the past that there seems to be at least one Fraggle Rock song that fits every situation and event.  That continues to hold true, even in the wake of the senseless and horrific:

“But I had a dream it was time to begin, and every creature… / We were sister and brother we were part of each other and it made us one / And it made us win. “

“It can make you ache for the sake of another / And it takes your life, and it stakes it too / And it makes you make the world come new.”