You must throw away your bad habits to get good.
The simplest is always the most difficult.
Focus on the future for 50%, on the present for 40%, and on the past for 10%
Always be able to kill your students
Looking for the meaning of life, one man can discover the order of the universe. To discover the truth, to achieve. a higher spiritual state, that is the true meaning of ninja.
The first priority to the ninja is to win without fighting.