"The question of the Ring, is something that has been nagging Boromir since the journey began. Because he’s a human in a land of men, he is more susceptible to its power. And more likely to be tempted. This is a thing, that throughout the journey he is always trying to keep down. And keep back this temptation, this sort of need, to hold the ring. To just have it in his presence. At the end , when he sees Frodo, in one of his weak moments, it finally overcomes him. It’s like a drug. Eating away. He’s overcome with it at that point. Then he’s totally sorry. He’s devastated by that."Sean Bean on Boromir