Luke: I won't fail you. I'm not afraid.
Yoda: You will be. You will be.
If this was to tie up with the prequel trilogy (along with exaggerated yodaisms) it would go something like this:
Luke: I won't fail you. I'm not afraid.
Yoda: Good this is. On the path to the darkside you are not. No problems have we. Fucked the emperor is.