Frodo: It's a pity Bilbo didn't kill him when he had the chance.
Gandalf: Pity? It was pity that stayed Bilbo's hand. Many that live deserve death, and some that die deserve life. Can you give it to them, Frodo? Do not be too eager to deal out death and judgment. Even the very wise cannot see all ends. My heart tells me that Gollum has some part to play yet, for good or ill, before this is over. The pity of Bilbo may rule the fate of many.
(Gollum backs off. Frodo sits down next to Gandalf with a sigh)
Frodo: I wish the Ring had never come to me. I wish none of this had happened.
Gandalf: So do all who live to see such times, but that is not for them to decide. All we have to decide is what to do with the time that is given to us...