So much for having more time today... but I'd like to say one thing which at the moment quite intrigues me.
For the story this really is quite an important chapter as it lays the ground for the story to take place but I'm beginning to wonder whether Tolkien also laid the basis of his metaphysical unverse here as well.
In the beginning of the chapter where Frodo asks why would Sauron wish for such slaves as Hobbits Gandalf tries to explain that terrible idea of someone just wishing harm to someone else with: "there is such a thing as malice and revenge".
So we have the evil principles of malice and revenge brought forth.
In the end of the chapter, after learning all the harm Gollum had caused and about the dire threat to himself Frodo curses why Bilbo didn't "stab the vile creature when he had a chance". And Gandalf answers with the two other basic principles of pity and mercy.
So: pity vs. malice and mercy vs. revenge.
Quite neat pairs indeed to run a universe.
And to top that we can find Gandalf telling Frodo how Bilbo was meant to have it and he succeeded with it, and so by that also Frodo was meant to have it and so on. So there is a benevolent whatever helping things turn out for the good - even if the living beings need to make their best effort and make the right choices if they are to succeed - "All we have to decide is what to do with the time that is given us".
These principles indeed form the backbone of the whole story one might say and the universe in which all our heroes (not just Frodo and Sam) have their trials and tribulations and in where they have to make their choises.