Appraise war in terms of the fundamental factors. The first of these factors is moral influence.
Plan for what is difficult while it is easy, do what is great while it is small.
If you are strong, appear weak. But if you are weak, appear strong.
In war, then, let your great object be victory, not lengthy campaigns.
Begin by seizing something which your opponent holds dear; then he will be amenable to your will.
To a surrounded enemy, you must leave a way of escape.