'But I said to myself: "After all he comes of a long-lived family on his mother's side. There is time yet. Wait!"
'And I waited. Until that night when he left this house. He said and did things then that filled me with a fear that no words of Saruman could allay. I knew at last that something dark and deadly was at work. And I have spent most of the years since then in finding out the truth of it.'
'There wasn't any permanent harm done, was there?' asked Frodo anxiously. 'He would get all right in time, wouldn't he? Be able to rest in peace, I mean?'
'He felt better at once,' said Gandalf. 'But there is only one Power in this world that knows all about the Rings and their effects; and as far as I know there is no Power in the world that knows all about hobbits. Among the Wise I am the only one that goes in for hobbit-lore: an obscure branch of knowledge, but full of surprises. Soft as butter they can be, and yet sometimes as tough as old tree-roots. I think it likely that some would resist the Rings far longer...'