That lead to disaster…

"Just because I can do karate, I can teach it."

"Just because I have a black belt, I should have my own school."

"Just because I can teach karate, I should have my own school."

"Just because I can do karate, I can fight."

"Just because I have a black belt, I can fight."

"Just because I am a karate teacher, I can fight."

"Just because I am a karate teacher, I know everything."

"Just because I am a karate teacher, I know all other styles."

"Just because I know a little karate, specially after reading a Bruce Lee book, I have my own style."

"If there comes a new school in my neighborhood, that is more students that won’t come to mine."

"It is the teacher’s job to teach."