After the successful conclusion of the battle against the force from the south Faramir begins an interrogation of his prisoner. When Sam awakens from his sleep he finds Frodo standing before Faramir’s men seated “in a wide semicircle, between the arms of which Faramir was seated on the ground… It looked strangely like the trial of a prisoner.”
At the heart of Faramir’s questioning is the verse that Boromir took to Rivendell in order to seek counsel from Elrond.
Seek for the sword that was broken: In Imladris it dwells; There shall be counsels taken Stronger than Morgul-spells. There shall be shown a token That Doom is near at hand, For Isildur’s Bane shall waken, And the Halfling forth shall stand.”
It is Isildur’s Bane about which Faramir shows most interest and Frodo tries to deflect this by speaking of the sword of Elendil and about Aragorn for Isildur’s Bane is the Ring of Power that Isildur took from the hand of the Dark Lord and which slipped from his finger so betraying him to the Orcs that had ambushed him. Frodo has already seen what the Ring can do when he narrowly escaped from the clutches of Boromir; now he learns that Faramir is Boromir’s brother and for the first time he learns that Boromir is dead.
Frodo may have tried to deflect Faramir from asking more about Isildur’s Bane but at no point does he try to deceive his captor. Frodo is a truth teller and he simply tells Faramir that he cannot speak more of his errand or of the nature of what Isildur’s Bane might be. His authority comes, not from himself, but from the Council that charged him with his task. When he speaks to Faramir and his men it is as if Elrond himself stands there and alongside him Gandalf, Aragorn heir of Elendil and Glorfindel, long ago the conqueror of the Witch King of Angmar, the Lord of the Nazgul; for all were present at the Council and all charged Frodo with the task of taking the Ring to the fire in order to destroy it. Frodo is their messenger and he does not speak for himself alone.
When a person with authority speaks to another who has authority and a person who sis a truth-teller speaks to another who is a truth-teller they will recognise each other. Frodo feels in his heart that Faramir though “much like his brother in looks, was a man less self-regarding, both sterner and wiser”; and Faramir says to Frodo, “there is something strange about you… an Elvish air, maybe.” So Faramir chooses not to make a final judgement but to take Frodo and Sam to his secret refuge in order to give himself time to think more about what he should do.
Only those who speak the truth can discern the truth when it is spoken to them. Faramir’s caution in dealing with Frodo is not the consequence of a mistrust of the one with whom he has to do but a consequence of the gravity of the choice he has to make.
There is a lovely story in the gospels of an encounter between Jesus and a Roman Centurion, whose servant is near death. Jesus, the man of occupied Palestine, gives the centurion of the occupying army an order. Immediately the centurion recognises that Jesus has the right to do this, obeys the order and finds his servant healed. Those who learn to live most effectively in the world are those who learn to live under the authority of the deepest reality of all.