You have a quarrelsome mind. Unless you learn how to calm it, you will never hear the world outside.

— Li Tsung (Bruce Lee)

8 seconds sound clip from Longstreet (1971) - The Way Of The Intercepting Fist sitcom.

You can hear this line at 00:24:10.660 in the Blu-ray version of the TV Series.

Quote context

[...]

- Li, sorry I blew it yesterday. Can we pick up where we left off?

- It's a matter of survival now.

- I talked to Jim Bolt.

- You went to him?

- I tried to get him to blow his cool, but so far it hasn't worked.

- Now I have to go down to the dock and fight him.

- You have a quarrelsome mind. Unless you learn how to calm it, you will never hear the world outside.

- You just tell me what I have to do to get you back.

- Nothing you can do.

- All right, then I'll just have to fight him as is.

- Li, I want you to believe it's more than just learning how to defend myself.

- There were a couple of times there when you were teaching me that I felt that my body and my head really were together.

[...]