Yoda: "Why wish you become Jedi?"
Luke Skywalker: "Well, mostly because of my father, I guess."
Yoda: "Ahh... father. Powerful Jedi was he. Powerful Jedi."
Luke Skywalker: [suspicious] "Oh, come on! How can you know my father? You don't even know who I am. Oh, I don't even know what I'm doing here! We're wasting our time!"
[Yoda looks away from Luke]
Yoda: "I cannot teach him. The boy has no patience."
Obi-Wan Kenobi: "He will learn patience."
Yoda: "Much anger in him... like his father."
Obi-Wan Kenobi: "Was I any different when you taught me?"