"In the moment when I truly understand my enemy, understand him well enough to defeat him, then in that very moment I also love him. I think it's impossible to really understand somebody, what they want, what they believe, and not love them the way they love themselves." Ender is telling Valentine why he hates himself.
https://www.youtube.com/watch?v=qwMUlFU1Db4
"In the moment when I truly understand my enemy, understand him well enough to defeat him, then in that very moment I also love him. I think it's impossible to really understand somebody, what they want, what they believe, and not love them the way they love themselves." Ender is telling Valentine why he hates himself.