One of my favorite poems, by Perch Shelley.
Another one is Ode to a Nightingale by John Keats.
. . . . .
Darkling I listen; and, for many a time
I have been half in love with easeful Death,
. . . . .
Charm'd magic casements, opening on the foam
Of perilous seas, in faery lands forlorn.
Then there is this one. Housman was writing about the initial British Expeditionary Force in World War One, composed of all long-serving volunteer troops.
Epitaph on an Army of Mercenaries
By A. E. Housman
These, in the days when heaven was falling,
The hour when earth's foundations fled,
Followed their mercenary calling
And took their wages and are dead.
Their shoulders held the sky suspended;
They stood, and the earth's foundations stay;
What God abandoned, these defended,
And saved the sum of things for pay.