“The skilful fighter puts himself into a position which makes defeat impossible, and does not miss the moment for defeating the enemy.”
Engineer the situation so you cannot lose, then act the instant the chance appears.
Chapter 4 gathers its threads into one sentence: the skilful fighter puts himself into a position which makes defeat impossible, and does not miss the moment. Both halves are required, and their order is the teaching. Position first — structural, patient, boring. Moment second — watched for, recognized, seized. The chapter began with invulnerability and ends here with the synthesis: safety plus alertness equals the whole game.
A craft brewery survives its first decade neither by the best beer nor the boldest bets, but by structure: owned equipment, no single distributor above a fifth of volume, cash reserve equal to a year of payroll. Rivals brew better and die faster. Then a distribution slot opens in a bankruptcy sale — a moment lasting nine days — and only the structured brewery can move instantly without financing. The position had been waiting years for that moment to exist.
Positions that make defeat hard are not conservative by nature — the brewery example is all offensive capacity in disguise (the reserve is ammunition). The misreading reads "defeat impossible" as small or safe. Sun Tzu’s own armies were aggressive; their invulnerability was in structure, which is precisely what let them accept risks others could not.