Time waits for no man.
To help others to develop and succeed in life is a reward itself and only has value when nothing is expected in return.
Refrain from reckless and thoughtless actions. Be as calm and judicious as a mountain.
Pain is the best instructor, but no one wants to go to his class.
A true Grandmaster is a person who starts the arts at a very young age and continues it until their body will no longer allows it. Then they still contribute mentally to the art.