I enjoy quotes, and since this is the largest forum for martial arts, it seems according that perhaps it contain this. I figure if everyone posts their favorite quote related to martial arts, and a favorite quote from a martial arts teacher of theirs, this will be something worth time and again. If possible, please give credit for who said it ^^. If you'd like to include your own, feel free, but give credit where due 
I'll go first to kick it off.
“The true science of martial arts means practicing them in such a way that they will be useful at any time, and to teach them in such a way that they will be useful in all things.”
-Miyamoto Miyazashi
“If you punch your enemy and he isn't knocked out, you aren't punch hard enough.”
-Master Fazel Khan
“Every martial art is but a facet of the greater gem of what the arts represent. If you only look at it one way, how can you ever really claim to see its complete depth?”
-Myself

I'll go first to kick it off.
“The true science of martial arts means practicing them in such a way that they will be useful at any time, and to teach them in such a way that they will be useful in all things.”
-Miyamoto Miyazashi
“If you punch your enemy and he isn't knocked out, you aren't punch hard enough.”
-Master Fazel Khan
“Every martial art is but a facet of the greater gem of what the arts represent. If you only look at it one way, how can you ever really claim to see its complete depth?”
-Myself