Bombadil and Gandalf

[Cameron Waite]

Last night i nearly finished Rotk for about the 10th time. However i have never really understood one of Gandalf's statments. Speaking of Bombadil he says something to the affect that "he is a moss gatherer and i have been a stone doomed to rolling." What does this mean? He also says that he must leave the hobbits for a time to talk with Bombadil "a talk that i havent had in all my time." What is the significance of this important discussion? Maybe i am way off but perhaps he is handing over his stewardship and care of the Shire to Bombadil and so therefore Bombadil can stop gathering moss and be the rolling stone. That is a wild guess but the only thing i can come up with.