Robby: You're wasting your time, old man. The last thing I need right now is another sensei.
Kreese: Fair enough. I don't think there's much I can teach you right now anyway. Except maybe this. All that Miyagi do mumbo jumbo, that might score you points in a tournament, but now, you're in the real world, kid. You might want to learn to strike first.

Amanda: Look, Sam, I don't know what's going on with you.
Sam: No. You don't.  And if you really think that Karate is the problem, then you haven't been paying attention.

Tell your brain to tell your legs to get their asses moving.

Johnny

If an enemy insists on war, then you take away their ability to wage it. 

Chozen

Hawk: What do you want?
Sam: Payback.

Sam LaRusso, where are you bitch? 

Tory

Chozen: Your sensei is a man of great honor. I can only hope to be like him.
Daniel: Hey, you only did what your teacher told you to do.
Chozen: After our fight, I felt great shame. I wanted to die. But my uncle saved me. He gave me a chance to prove myself. I spent my life trying to do just that but regret is sometimes difficult to overcome. 

Kreese: You're a feisty one, but I like that. I like it-
Amanda: I don't give a shit what you like. You're a sociopath. And I'm shutting you down if it's the last thing I do.

Cobra Kai Season 3 Episode 5 Quotes

If an enemy insists on war, then you take away their ability to wage it. 

Chozen

Amanda: Look, Sam, I don't know what's going on with you.
Sam: No. You don't.  And if you really think that Karate is the problem, then you haven't been paying attention.