[HairOfTheDog]

He is a different hobbit, certainly from the one who said "he could not do it alone" in Lothlorien only days before.

There is a confidence and courage about him also when he is confronted by Boromir. "Your words would seem like wisdom, but for the warning in my heart" is a pretty insolent thing for a little hobbit to say to a warrior of Gondor.

I think it happened at the shoreline when he tucks the ring back in his pocket and shoves the boat out from shore. Whether the motivating words from Gandalf were a vision, or just a memory... He became his own master... and the effect seems to have been a calming one.

Without checking, I think we get more fear, doubt and increasing fatigue from Frodo at this point in the book, but I am pleased that Jackson gave us this impression that Frodo was OK with it and serene. Angst is an unsatisfying place to leave us at the end of a film!

He is no longer a shy passenger in the fellowship, looking for direction from someone else, he has become the master of his own destiny.

[Penny1]

I think you are right about when that last change occurred in Frodo. I think more and more about what he is really wrestling with on the banks of the Anduin. It's not just about having the courage to go forward alone, but I think it's grappling with choosing to walk straight into death itself. He knows he is no match for Sauron, for Mordor, or for the ring. Once he has made his choice to surrender his own life, then the turmoil and angst evaporates.