That was the first lesson. I didn't understand it at the time but now it is much clearer in my mind. The second came when I found Grievous' ghost there. That one I do believe I was meant to fight. He taunted me, talking about my need for revenge and how I'd always failed to take it upon those I felt had wronged me. Sidious, you, Dooku, Grievous himself, he kept talking about how I'd accomplished nothing in seeking those out that I felt had caused me pain. He asked me how it felt to have the one I sought upon him to be stolen by virtue of you killing him before I could.

[Maul looked down at the floor.]

I had to confront the fact I never wanted to put into that position in the first place. I didn't ask to become a Sith and have all this pain brought into my life. That I was holding onto my desire for revenge because I felt I'd have nothing else in my life. When I finally killed the ghost, it felt hollow. Revenge had taken everything from me and left me not even with satisfaction.

[It had taken him a long time to come to that conclusion in Trench. Usagi and Obi-Wan had both helped him reach that conclusion until he could understand it for himself.]