Please explain these two Ending Quotes...

[Reav3R]

I've watched Final Fantasy VII: Advent Children & The Matrix Revolutions many times now but I find their ending quotes utterly meaningless, I just can't get it. Someone please explain the meaning behind these two quotes from the movies mentioned above:

 

Sephiroth: Tell me what you cherish most. Give me the pleasure of taking it away.
Cloud: You just don't get it. There isn't a thing I don't cherish!

I really don't understand what the purpose of this dialog is. Does it simply mean that Cloud cares about everything equally? Even so it's really shallow.

 

Agent Smith: Wait. I've seen this. I stand here, right here, and I'm supposed to say something. I say, "Everything that has a beginning has an end, Neo."
[pause]
Agent Smith: What? What did I just say?

I don't get the purpose of this dialog either. Does it mean that even Agent Smith must have an end? Again, if that's the meaning, it's really shallow and simple.