Haven't you heard? The first virtue is to be calm. Calm must be the basis of Kung Fu. It's a mental discipline.
12 seconds sound clip from the Mystery of Chess Boxing movie soundboard.
You can hear this line at 00:46:43 in the DVD version of the movie.
Quote context
[...]
- Once a pawn has crossed the line, he has to stay. There's no way back.
- Teacher? Something I must say. I don't want to, but I must.
- Go on.
- Well, in fact you're already learning.
- And playing chess will teach you to achieve calmness of mind. I've never discovered a better way.
- Ghost Faced Killer! Now I've finally caught up with you!
[...]