Roy Batty's...
"I've seen things you people wouldn't believe. Attack ships on fire off the shoulder of Orion. I watched C-beams glitter in the dark near the Tannhauser gate.
All those moments will be lost in time, like tears in rain. Time to die."
From the end of Bladerunner. Beautifully filmed and scored too.
http://www.youtube.com/watch?v=YOphFl88U-g
EDIT!! JohnVF in Post 5 beat me to it! (But it DOES bear repeating
)