Gandalf's Ring

The rings were definitely connected. I agree that there is a difference between wearing the ring to disappear and wearing it to wield it to conquer Middle Earth. But, of the five Wizards only Gandalf had any forbodings about the one ring. Saruman knew more, but he studied the ring for much longer then Gandalf. Gandalf was also the only Wizard to have one of the three rings of the elves. It seems more than a coincedence that without his advice to Thorin, which seemed absurd to all the Dwarves, that the ring of power would never have been found.