Authors:

When you attack the enemy, your spirit must go to the extent of pulling the stakes out of a wall and using them as spears and halberds.

Miyamoto Musashi (2013). “The Book of Five Rings: A Text on Kenjutsu and the Martial Arts in General, Written by the Swordsman Miyamoto Musashi”, p.66, Lulu Press, Inc
When you attack the enemy, your spirit must go to the extent of pulling the stakes out of a wall and using them as spears and halberds.