Sozin: With Roku gone, and the great comet returning, the timing was perfect to change the world. I knew the next avatar would be born an air nomad. So I wiped out the air temples. But somehow, the new avatar eluded me. I wasted the remainder of my life searching in vain. I know he’s hiding out there somewhere. The Fire Nation’s greatest threat…the last airbender.
You figured you’d toy with me until someone better came alone and I wouldn’t mind because I was lucky a big star wanted me. You know what really sucks about falling for a guy you know you’re not right for? You fall anyway because you think he might turn out to be different.