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.

The important thing in strategy is to suppress the enemy's useful actions but allow his useless actions

A man cannot understand the art he is studying if he only looks for the end result without taking the time to delve deeply into the reasoning of the study.

From inside fortifications, the gun has no equal among weapons. It is the supreme weapon on the field before the ranks clash, but once swords are crossed the gun becomes useless.

Even if a man has no natural ability, he can be a warrior.

You win battles by knowing the enemy's timing, and using a timing which the enemy does not expect.

Do nothing which is of no use.