“The victorious strategist only seeks battle after the victory has been won, whereas he who is destined to defeat first fights and afterwards looks for victory.”

Fight only after the victory is already arranged by preparation; the loser hopes to find it mid-battle.
Chapter 4’s most quoted formulation — and its last word on sequencing: the victorious strategist seeks battle after the victory has been won; the destined loser fights first and looks for victory afterward. It is the same teaching as the book’s famous fourth-chapter idea, stated as a biography: winners and losers are distinguishable by where in time they did their winning work.
Two consultants walk into the same pitch. One spent the prior month with the client’s team, unpaid, understanding the real decision — so the "pitch" is a confirmation of work already jointly done. The other prepared magnificently for the meeting itself: slides, presence, improvisation. The first wins routinely and looks lucky. The second loses elegantly and blames the chemistry. Both fought; only one had already won.
This is not a brief for over-preparation as procrastination — the victorious strategist does eventually fight, and decisively. Nor does pre-arranged victory mean rigging outcomes; it means doing, in advance and unglamorously, the work that the fight only ratifies. The loser’s error is believing the contest happens at the contest.