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.

So a military force has no constant formation, water has no constant shape: the ability to gain victory by changing and adapting according to the opponent is called genius.

It is the business of a general to be serene and inscrutable, impartial and self-controlled.

Plan for what is difficult while it is easy, do what is great while it is small.

He who is prudent and lies in wait for an enemy who is not, will be victorious.

This does not mean that the enemy is to be allowed to escape. The object is to make him believe that there is a road to safety, and thus prevent his fighting with the courage of despair. After that, you may crush him.

Thus, though I have heard of successful military operations that were clumsy but swift, cleverness has never been seen associated with long delays.