The skillful tactician may be ...

The skillful tactician may be likened to the shuai-jan. Now the shuai-jan is a snake that is found in the Ch\'ang mountains. Strike at its head, and you will be attacked by its tail; strike at its tail, and you will be attacked by its head; strike at its middle, and you will be attacked by head and tail both.
The skillful tactician may be likened to the shuai-jan. Now the shuai-jan is a snake that is found in the Ch'ang mountains. Strike at its head, and you will be attacked by its tail; strike at its tail, and you will be attacked by its head; strike at its middle, and you will be attacked by head and tail both.

Quotes from the same author

You have to believe in yourself.
Can you imagine what I would do if I could do all I can?
The supreme art of war is to subdue the enemy without fighting.
“Victorious warriors win first and then go to war, while defeated warriors go to war first and then seek to win.”
“Let your plans be dark and as impenetrable as night, and when you move, fall like a thunderbolt.”