In the military one normally seeks order, bravery and strength. Thus the Shiyijia zhu commentatotrs, and some modern translators, have made this passage say what they would like it to mean, sc. that order is born from chaos, etc. The Sunzi, however, while never denying that possibility, is here making a different point, one that refers us back to the circularity that is present in earlier passages of this chapter. Order and chaos are mutually defined and mutually dependent. They are two poles of an uneasy, ever-shifting balance. If, instead of seeking one pole and avoiding the other, one steps out of the balancing act, one can attain victory. In this case, the text recommends "counting"--the "ordering of the many as if they were few" that opens the chapter.
Here "form," the subject of chapter 4, begins to show its common ground with shi. (We have already noted the strong resemblance between the concluding passages of chapter 4, said to describe form, and the ending of this chapter, on shi.)