Being unconquerable lies with yourself; being conquerable lies with your enemy.

The line between disorder and order lies in logistics.

The ultimate in disposing one's troops is to be without ascertainable shape. Then the most penetrating spies cannot pry in nor can the wise lay plans against you.

Weigh the situation, then move.

The best victory is when the opponent surrenders of its own accord before there are any actual hostilities...It is best to win without fighting.

If, however, you are indulgent, but unable to make your authority felt; kind-hearted, but unable to enforce your commands; and incapable, moreover, of quelling disorder: then your soldiers must be likened to spoilt children; they are useless for any practical purpose.

Opportunities increase as they are taken.