I love these, ive got a few for you, maybe not all ones relevent too martial arts.
They may not all be accurate.

1) " Every great journey starts with a single step "

2) "One day i met a man with no shoes, the next day i met a man with no feet"

3) "Man fears what he does not understand" - Bruce Lee

4) "You miss 100% of the shots you don't take"

5)"A fool is someone who is affraid too be seen as foolish"

Hope any of these help