Gandalf at Zirak-zigil

[Inziladun]

Originally Posted by Dakêsîntrah

This would infer that the spirit "Gandalf" was gone forever and the spirit that replaced him as "The White" was Eru Himself. He was still Gandalf to the physical beings in Middle earth, for Gandalf was only recognizable by his physical shell.

No, I think "Gandalf" was still essentially himself as all in Middle-earth had known him in not only looks, but also personality and life-force. His spirit had left the physical world temporarily, including the "hidden" plane where the Valar and Eldar existed, and he was given by the One a second chance to accomplish his mission of bringing about the destruction of Sauron. Since the stakes had become so high, and the other Istari were no longer involved in helping the fight, Gandalf was enhanced in power and wisdom by Eru and sent back to finish things. Eru himself would not have taken such a direct role in the events in Arda. The only time we know of that he did so was during the Downfall of Númenor, and on that occasion the Valar themselves asked for Eru's intervention. There is no evidence the Valar did so upon the death of Gandalf.

[Ibrîniðilpathânezel]

I don't believe it was Eru, because Tolkien said flat out that He never appeared in Middle-earth, and Tolkien felt himself not up to the task of writing about an embodied Creator. Also, it is explicitly said that Gandalf was the only one of the wizards who succeeded in his task and returned to Aman. I believe in that same letter Tolkien says that he was given an enhancement of power and returned to finish his tasks. Regardless of the body, his spirit was an immortal 'divine' spirit, as were those of the other wizards. Saruman did not dissipate into nothingness after his body was slain, so why should Gandalf?

Can't look up much in the way of references, since I'm now on vacation, and loving it. Just winging it, here...