The sword has to be more than a simple weapon; it has to be an answer to life's questions. - Miyamoto Musashi

Cuando miro a la sociedad, veo que la gente convierte las artes en ganancias comerciales;

In the Way of my school, it is proper procedure for novices to train by wielding a long sword in one hand and a short sword in the other. This is crucial. When the time comes to abandon life in combat, a warrior must make full use of all the weapons at his disposal. To perish with a weapon uselessly sheathed at one’s side is shameful.

The "mountain-sea" spirit means that it is bad to repeat the same thing several times when fighting the enemy. There may be no help but to do something twice, but do not try it a third time. If you once make an attack and fail, there is little chance of success if you use the same approach again.