The Two Towers by J.R.R Tolkien (Harper Collins 1991, 2007) pp. 544-546
Boromir has passed over Rauros in the elven boat in which Aragorn, Legolas and Gimli have laid him, and by virtue of the skill learned by Elves over thousands of years in which craft and nature have become seamlessly woven together the boat is not dashed to pieces by the force of water and of rock nor have its contents been spilled into the river. The three companions have done their duty to their comrade and now they may turn their attention to their duty to the hobbits.
Already they know that Merry and Pippin have been taken by the Uruk-hai, the orcs of Isengard, back towards their fortress across the plains of Rohan and soon it becomes clear what has become of Frodo and Sam.
“So much at least is now clear,” said Legolas: “Frodo is no longer on this side of the River: only he can have taken the boat. And Sam is with him; only he can have taken his pack.”
The companions have a choice. Either they can follow Frodo, as Sam has done, and guide him to Mordor, or they can follow Merry and Pippin and their orc captors towards Isengard. Neither path holds out much hope for them. In doing their duty to Boromir they have lost many hours.
At last Aragorn makes his choice.
“Let me think!” said Aragorn. “And now may I make a right choice, and change the evil fate of this unhappy day!” He stood silent for a moment. “I will follow the Orcs,” he said at last. “I would have guided Frodo to Mordor and gone with him to the end; but if I seek him now in the wilderness, I must abandon the captives to torment and death. My heart speaks clearly at last: the fate of the Bearer is in my hands no longer. The Company has played its part. Yet we that remain cannot abandon our companions while we have strength left.”
Aragorn speaks of the fate of the day. He is seeking after the biggest story that he can find and tell about all that has befallen the Fellowship since it began. The day began with a belief among them all that they would make a decision together and follow it together. Only Boromir had made it clear from the beginning that he would travel on to Minas Tirith whatever choice was made by the others. Frodo is becoming ever more certain that he must make the journey alone to Mordor but he is afraid to tell the others, afraid too of the journey itself. But now the possibility that the Fellowship might make a decision together has been made impossible. In trying to take the Ring from Frodo Boromir has set in motion a chain of events that means that the Fellowship can never take one course of action together again. Frodo and Sam have crossed the Anduin together. Boromir has died defending Merry and Pippin from the Uruk-hai of Isengard and the young hobbits have been taken prisoner.
Frodo has made a free choice and Sam has gone with him. Merry and Pippin are prisoners. And so Aragorn must honour both Frodo’s freedom and the young hobbits’ captivity. He will not guide Frodo to Mordor. That necessary task will be undertaken by the most unlikely of people, by one who seeks to kill him and to regain the Ring. The young hobbits will regain their freedom in the confusion of battle. The three hunters will not find them again until they meet amidst the ruin of Isengard. No choice that Aragorn will take this day will lead to either course of events and yet he must still choose.
I spoke of the fate of the day, of the task of seeking the biggest story that can be found. The story that Aragorn chooses is that of freeing the captives or dying in the attempt. He knows that it is the dying that is most likely and that, like Boromir, he will probably fall in hopeless defence of two hobbits who probably should not have come with them in the first place but that in choosing this story he opens the possibility that something greater, more wonderful, might happen. And at the very least he will do something worthy of a song.