By knowing things that exist, you can know that which does not exist.

When you cannot be deceived by men you will have realised the wisdom of strategy.

Strategy is the craft of the warrior.

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?

The ultimate aim of martial arts is not having to use them

Imitation is the surest form of flattery and failure. I am not interested with your talk about my ideas. I am more interested in your applying them to your life. If you do not, then you are essentially not in accord with your own mind.

Perceive that which cannot be seen with the eye.