Mistakes are always forgivable, if one has the courage to admit them.
A quick temper will make a fool of you soon enough.
Be like water, my friend.
Independent inquiry is needed in your search for truth, not dependence on anyone else's view or a mere book.
The reward is found in the work.
The principle of martial arts is not a thing that can be learned, like a science, by fact-finding and instruction in facts. It has to grow spontaneously, like a flower, in a mind free from emotions and desires.