Star Wars | Obi-Wan vs Grievous (Revenge of the Sith novel version)
"He must have been trained by Count Dooku," Mace had said, "so you can expect Makashi as well; given the number of Jedi he has fought and slain, you must expect that he can attack in any style, or all of them. In fact, Obi-Wan, I believe that of all living Jedi, you have the best chance to defeat him."
This pronouncement had startled Obi-Wan, and he had protested. After all, the only form in which he was truly even proficient was Soresu, which was the most common lightsaber form in the Jedi Order. Founded upon the basic deflection principles all Padawans were taught - to enable them to protect themselves from blaster bolts - Soresu was very simple, and so restrained and defense-oriented that it was very nearly downright passive.
"But surely, Master Windu," Obi-Wan had said, "you, with the power of Vaapad - or Yoda’s mastery of Ataro-"
Mace Windu almost smiled. “I created Vaapad to answer my weakness: it channels my own darkness into a weapon of the light. Master Yoda’s Ataro is also an answer to weakness: the limitations of reach and mobility imposed by his stature and his age. But for you? What weakness does Soresu have?”
Blinking, Obi-Wan had been forced to admit he’d never actually thought of it that way.
"That is so like you, Master Kenobi," the Korun Master had said, shaking his head. "I am called a great swordsman because I invented a lethal style; but who is greater, the creator of a killing form - or the master of the classic form?"
"I’m very flattered that you would consider me a master, but really-"
"Not a master. The master,” Mace had said. “Be who you are, and Grievous will never defeat you.”
- Revenge of the Sith novel, by Matthew Stover