Wow, I love a lot of quotes from this movie, lol.
My favorites are probably these:
"No king, no king, la la la la la la!" - The Hyenas
"You're in trouble again, and this time Daddy isn't here to save you. And now everyone knows why!" - Scar
"You said you'd always be there for me! But you're not. And it's because of me. It's my fault." - Simba