Strategy is the craft of the warrior.

Unless you really understand others, you can hardly attain your own self-understanding.

There are many ways of understanding simple things, but generally the opposite is true for difficult ideas

Step by step walk the thousand-mile road.

Never stray from the Way.

Do not let your spirit be influenced by your body, or your body be influenced by your spirit. Be neither insufficiently spirited or over spirited. An elevated spirit is weak and a low spirit is weak. Do not let the enemy see your spirit.

Do not let your opponent see your spirit