or the episode where Kramer joined a karate class with a bunch of kids and was whooping on them 
Elaine: Well, I'm just gonna tell him no. I can't run the catalog.
Kramer: Whoa, whoa. Can't? When did that word enter your vocabulary? What, is the job too difficult? (Jerry nods) What, you don't have enough experience? (Jerry shakes his head) Oh, you're not smart enough? (Jerry shakes his head) Where's your confidence? (Jerry shrugs his shoulders) Look, Elaine, let me tell you a story. When I first studied karate...
Elaine: Karate?
Kramer: Yeah, karate. I had no support. Not from him, not from Newman, no one. The first time I sparred with an opponent, I was terrified. My legs, they were like noodles. But then I looked inside, and I found my katra.
Elaine: Katra?
Kramer: Yeah, your spirit, your, uh, being. The part of you that says, "Yes, I can!"
Jerry: Sammy Davis had it.
Kramer: So I listened to my katra and now <vreep> I'm dominating the dojo. I'm class champion.
Elaine: Well, you know, I, I have watched Peterman run the company.
Kramer: Sure you have.
Elaine: I know how to do it. Pair of pants, a stupid story, a huge markup. I can do that.
Kramer: You follow your katra, and you can do anything. (leads her to the door) Now get out of here.
Elaine: (excitedly) Okay.
[Kramer slams the door behind her.]
Kramer: That kid is gonna be all right.
Jerry: No, she's not.