Of all the things I never thought I'd write, non-parodic poetry for the Silmarillion has to be in the top ten. But some phrases just kind of stick in your mind until you have to do something with them...
Nirnaeth Arnoediad
No song can hold the sorrow,
no tale the grief contain.
No comfort brings the morrow,
the darkness will remain.
Nought left but desperation;
no words can ease the pain,
no song brings consolation.
No one can count the slain.
No comfort brings the morrow,
nor will a hundred years.
No song can hold the sorrow
and none can count the tears.