Yes, I was told that too when I was training. I can say confidently that I am a much more peaceful man as a result of the training that I went through. No question in my mind or heart. Bravo to your sons!

Miyagi: Someone always know more.
Daniel: You mean there were times when you were scared to fight?
Miyagi: Always scare. Miyagi hate fighting.
Daniel: Yeah, but you like karate.
Miyagi: So?
Daniel: So, karate's fighting. You train to fight.
Miyagi: That what you think?
Daniel: [pondering] No.
Miyagi: Then why train?
Daniel: [thinks] So I won't have to fight.
Miyagi: [laughs] Miyagi have hope for you.

The Karate Kid (1984)