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.

Also by training you will be able to freely control your own body, conquer men with your body, and with sufficient training you will be able to beat ten men with your spirit. When you have reached this point, will it not mean that you are invincible?

All man are the same except for their belief in their own selves, regardless of what others may think of them

Strategy is the craft of the warrior.

You may abandon your own body but you must preserve your honour.

See to it that you temper yourself with one thousand days of practice, and refine yourself with ten thousand days of training.

In contests of strategy it is bad to be led about by the enemy. You must always be able to lead the enemy about.