Saruman has no desire for repentance or for Gandalf’s freely offered help. He doesn’t trust Gandalf, expecting him to seek to empower and enrich himself, as Saruman himself would. Saruman no longer believes in selflessness, especially among the powerful. Since Saruman refuses to give up his power, Gandalf takes it from him, not to use for himself, but—in breaking the staff before Saruman’s eyes—to remove from the world. Gandalf’s haste to take the crystal ball from Pippin and his remark about its importance to Saruman indicate that it’s both powerful and dangerous.