Anakin's Thoughts While Being Burned Alive And Being Turned Into Darth Vader

One of the most dark and iconic scenes in Star Wars The Revenge of the Sith, when Anakin Skywalker loses to Obi-Wan Kenobi on Mustafar and catches  on fire. What were his thoughts? What drove him to keep climbing the high ground? Then, what were his thoughts as he was being turned into the cyborg Darth Vader as Palpatine (Darth Sidous) watched?  From the book - The Rise and Fall of Darth Vader