Why Wish You Become Jedi
Luke: I'm sure it's delicious. I just don't understand why we can't see Yoda now.
Yoda: Patience. For the Jedi, it is time to eat as well. Eat. Eat. Hot. Good food. Good.
Luke: How far away is Yoda? Will it take us long to get there?
Yoda: Not far. Yoda not far. Patience. Soon you will be with him.
...
Yoda: Root leaf. I cook. Why wish you become Jedi?
Luke: Mostly 'cause of my father, I guess.
Yoda: Father. Powerful Jedi was he. Powerful Jedi.
Luke: Oh, come on. How could you know my father? You don't even know who I am. I don't even know what I'm doing here. We're wasting our time!
Yoda: I cannot teach him. The boy has no patience.
Obi-Wan: He will learn patience.
Yoda: Much anger in him... like his father.
Obi-Wan: Was I any different when you taught me?
Yoda: No. He is not ready.
Luke: Yoda. I am ready. I can be a Jedi. Ben, tell him I'm...
Yoda: Ready, are you? What know you ready? For 800 years have I trained Jedi. My own counsel will I keep on who is to be trained. A Jedi must have the deepest commitment... the most serious mind. This one a long time have I watched. All his life has he looked away... to the future, to the horizon. Never his mind on where he was... what he was doing. Adventure. Excitement. A Jedi craves not these things. You are reckless.
Obi-Wan: So was I, if you remember.
Yoda: He is too old. Yes, too old to begin the training.
Luke: But I've learned so much.
Yoda: Will he finish what he begins?
Luke: I won't fail you. I'm not afraid.
Yoda: You will be. You will be.
STAR WARS Episode V The Empire Strikes Back