quickie but goodie: Apocalypse Now - "The horror. The horror."

http://www.youtube.com/watch?v=aNUr__-VZeQ

Probably as good a thing to say as anything when you're dying.

A more positive spin on life would be from Forest Gump: "life is a box of chocolates."

http://www.youtube.com/watch?v=mre9b61Gji0

This scene makes me cry every time I watch it. I love this film. There. I said it.

Little Women (1994). Winona Ryder as Jo, Claire Danes as Beth.

Beth: If God wants me with Him, there is none who will stop Him. I don't mind. I was never like the rest of you... making plans about the great things I'd do. I never saw myself as anything much. Not a great writer like you.

Jo: Beth, I'm not a great writer.

Beth: But you will be. Oh, Jo, I've missed you so. Why does everyone want to go away? I love being home. But I don't like being left behind. Now I am the one going ahead. I am not afraid. I can be brave like you. But I know I shall be homesick for you. Even in heaven.

http://www.youtube.com/watch?v=sjNMxjqIy88

From Magnolia, a very long deathbed monologue, here's the last part:

Earl Partridge: I loved her so. And she knew what I did. She knew all the fucking stupid things I'd done. But the love... was stronger than anything you can think of. The goddamn regret. The goddamn regret! Oh, and I'll die. Now I'll die, and I'll tell you what... the biggest regret of my life... I let my love go. What did I do? I'm sixty-five years old. And I'm ashamed. A million years ago... the fucking regret and guilt, these things, don't ever let anyone ever say to you you shouldn't regret anything. Don't do that. Don't! You regret what you fucking want! Use that. Use that. Use that regret for anything, any way you want. You can use it, OK? Oh, God. This is a long way to go with no punch. A little moral story, I say... Love. Love. Love. This fucking life... oh, it's so fucking hard. So long. Life ain't short, it's long. It's long, goddamn it. Goddamn. What did I do? What did I do? What did I do? What did I do? Phil. Phil, help me. What did I do?

--Earl Partridge (Jason Robards), Magnolia 1999, written by Paul Thomas Anderson

Big Fish -- Edward's Death.

http://www.youtube.com/watch?v=MtkvKz1Fg0Y

Other than "my girl, in the river"

The dialog... sorry John OR Tim... not sure who was responsible...

But I digress.

It's questionable whether this one meets your guidelines, but I'll suggest Carlito's Way. Carlito lived his whole life on his deathbed in a sense!

Carlito: [voiceover] Sorry boys, all the stitches in the world can't sew me together again. Lay down... lay down. Gonna stretch me out in Fernandez funeral home on Hun and Ninth street. Always knew I'd make a stop there, but a lot later than a whole gang of people thought... Last of the Moh-Ricans... well maybe not the last. Gail's gonna be a good mom... New improved Carlito Brigante... Hope she uses the money to get out. No room in this city for big hearts like hers... Sorry baby, I tried the best I could, honest... Can't come with me on this trip, Loaf. Getting the shakes now, last call for drinks, bars closing down... Sun's out, where are we going for breakfast? Don't wanna go far. Rough night, tired baby... Tired...

Starts around the 3:00 mark here: http://www.youtube.com/watch?v=XjWRMfSx_fo

From Cries and Whispers by Ingmar Bergman... I think there are plenty scenes there :D