[Bill Ferny]

I agree with obloquy. From the hints given in the books, it seems that the ring works upon the characters’ greatest temptations. Those who have great power to begin with, apparently are tempted to gain even greater powers, in the beginning to do good, but ultimately these greater powers only work toward the will of the ring’s true master, Sauron. To Galadriel’s credit, she perceived the temptation for what it was, self-aggrandizement. Once the temptation, itself, was dispelled she was able to allow the ring to pass from her reach. This “test” is further highlighted by Boromir’s inability latter in the book to overcome the exact same temptation.