I like the Magic Flute, but jseal, surely it has to be,

Nobody shall sleep!...
Nobody shall sleep!
Even you, o Princess,
in your cold room,
watch the stars,
that tremble with love and with hope.
But my secret is hidden within me,
my name no one shall know...
No!...No!...
On your mouth I will tell it when the light shines.
And my kiss will dissolve the silence that makes you mine!...
(No one will know his name and we must, alas, die.)
Vanish, o night!
Set, stars! Set, stars!
At dawn, I will win! I will win! I will win!

One of the mose beautiful pieces of music ever written, Nessun dorma.

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Calm, quiet, smooth, devastating