Proper training?

Quest Text Focus on your grip!
The spear will slip out of your hands if you have too many distractions inside your head.

Summary Proper training?
I'm not quite sure...
But our founders believed
that all things start from the heart.
That's why we were taught that meditations which clear the body and mind
are one of the best training methods.
Among those who have gone through extreme training,
there were ones who heard the voices of the spirits
as they trained in caves while giving up on food.
The intense training was able to give their hearts clarity.
However, I cannot do that! Giving up food would kill me
and turn into an actual spirit!