I do think Frodo's spells of temporary blindness have to do with him being
drawn into the spirit world. One of the effects of the Morgul-knife wound
was to make the world about him grow dim to his eyes. His entrancement by
the corpse-light also reminds me of his entrancement in the Dead Marshes.
His strong reaction to the Nazgul and the corpse-lights is not just an effect
of the Ring, but also of the Morgul-knife wound. He will never fully heal
in Middle-earth.
The pull of the Ring, on the other hand, reminds me of Weathertop and the
Mirror of Galadriel. The Ring also responds to the presence of the
Nazgul, no longer tempting Frodo but just attempting to overpower him.
This is the effect Tolkien describes in Letter 246 when he says that Frodo does
not succumb to temptation, but in the end is simply overpowered by the
Ring. Whether the Ring does so as an active agent or a mechanical device
is unclear at this point, but for me becomes more clear when the Ring puts
words in Frodo's mouth and curses Gollum on the steps of Mount Doom. Plus
those who have read Turin's story know that magical objects like Turin's
sword sometimes speak, and have a will of their own.
The green gleam is the nasty side of Gollum, or Stinker, as Sam calls
him. And it may indeed be called forth by the unholy light of Minas
Morgul, just as it is briefly subdued by the sight of Frodo sleeping. I
don't think the Ring is calling to or controlling Gollum, or else he would help
Frodo give himself up. Instead it is Gollum's own desire for the Ring
that controls him, and motivates him to save Frodo for the time being.
Gollum's lust for the Ring is no longer in the Ring's control. At this
point it starts to spoil the Ring's own plans, and eventually leads the Ring to
curse Gollum, and leads Gollum to defy the
Ring.
My Tolkien blog.________________________________________
"‘I think he was a silly little man,' said Councillor Tompkins. ‘Worthless, in fact; no use to Society at all.'
"‘Oh, I don't know,' said Atkins, who was nobody of importance, just a schoolmaster. ‘I am not so sure: it depends on what you mean by use .'
"‘No practical or economic use,' said Tompkins. . . .
. . .
"‘It is proving very useful indeed,' said the Second Voice. ‘As a holiday, and a refreshment. It is splendid for convalescence; and not only for that, for many it is the best introduction to the Mountains. It works wonders in some cases. I am sending more and more there. They seldom have to come back.'"
