Of old the expert in battle would first make himself invincible and then wait for his enemy to expose his vulnerability.

Keep your friends close and your enemies even closer.

If an enemy has alliances, the problem is grave and the enemy's position strong; if he has no alliances, the problem is minor and the enemy's position weak.

When the position is such that neither side will gain by making the first move, it is called temporising ground.

To know your Enemy, you must become your Enemy.

Other conditions being equal, if one force is hurled against another ten times its size, the result will be the flight of the former.

Go into emptiness, strike voids, bypass what he defends hit him where he does not expect you.