Nebulous "It" and Absolutes

[Dininziliel]

In spring of 1420, post-Shire scouring, Frodo became ill in early March. In "The Grey Havens" we are told that Farmer Cotton

found Frodo lying on his bed; he was clutching a white gem that hung on a chain about his neck and he seemed half in a dream. 'It is gone for ever,' he said, 'and now all is dark and empty.'

While it seems obvious that the "it" for which Frodo mourned was the Ring, there is something about those absolute terms, "forever," and "all" that causes my curiosity to nibble at the corners of possible meanings. The Ring may have been destroyed, but weren't some other things also gone forever--innocence, for instance? Was he speaking only of the emptiness in his life, or might he also have been registering the passing of a particular light and joy from ME?

The nature of the Ring has been discussed in eloquent detail, so this is not a thread about the Ring itself.

The question is: what does Tolkien tell us in his various stories, essays, and letters about the loss incurred through great and profound struggles--even when light triumphs over darkness. Is it possible to have the opposite outcome where "all is light and full of joy"?