“How long, I wonder, has he been constrained to come often to his glass for inspection and instruction, and the Orthanc-stone so bent towards Barad-dûr that, if any save a will of adamant now looks into it, it will bear his mind and sight swiftly thither? And how it draws one to itself! Have I not felt it? Even now my heart desires to test my will upon it, to see if I could not wrench it from him and turn it where I would—to look across the wide seas of water and of time to Tirion the Fair, and perceive the unimaginable hand and mind of Fëanor at their work, while both the White Tree and the Golden were in flower!”
— Gandalf