"I see folk who walk about in a sunken dream 'cause they feel nothing."

From the Life on Mars finale.

Nelson: I see a darkness in you, Sam.

Sam: Oh you can see into me, can you Nelson? Well come on then. Am I mad, eh? Is this real? C'mon. I just want to know the truth.

Nelson: We all want that, Sam. What's real, what's not. I see folk who walk about in a sunken dream 'cause they feel nothing. Are they alive?

Sam: I wake up every morning and I tell myself I am alive.

Nelson: When you can feel, then you're alive. When you don't feel, then you're not.