LAW 47: DO NOT GO PAST THE MARK YOU AIMED FOR; IN VICTORY, LEARN WHEN TO STOP

Set a goal, Greene insists, and when you reach it, stop; the discipline to halt at the mark is rarer and more valuable than the drive that got you there.

The mechanism is the way success distorts judgment. Momentum feels like destiny, and the emotions of victory — confidence swelling into arrogance, appetite growing with the feeding — override the cool calculation that earned the win. The victor, certain that more of the same will yield more success, presses on past the point of sound strategy and into the overextension where fortune turns. Greene's insight is that knowing when to stop requires resisting the most seductive feeling there is.

Greene's illustrations are the conquerors and operators who won decisively and then destroyed themselves by not stopping — the leader whose victory tempted him into one campaign too many, the figure who, having achieved his aim, kept pushing until he provoked the coalition or the collapse that ruined him. The pattern is brutally consistent: the seed of defeat is planted in the moment of greatest success, by the failure to recognize that the goal had been reached.

Reversal — Greene's reversal follows Machiavelli: destroy a man or leave him alone. The restraint the law urges does not apply to crushing an enemy already defeated, only to needlessly advancing against others. The remaining nuance is that the goal itself must be set thoughtfully in advance, because a stop with no predefined mark is as aimless as a charge with no limit. Define the destination, and the discipline becomes possible.

The applied takeaway is to decide in advance what success looks like and to stop when you reach it. In negotiation, competition, or any campaign, name your objective before you begin, and when you have achieved it, resist the intoxicating pull to extract more, conquer further, or press your advantage past the point of prudence. Quitting while ahead is not timidity; it is the rarest and most valuable form of self-control, and it is what preserves the victories that the undisciplined throw away.

Greene's deeper point is that power has a natural rhythm of rise and fall, and the master works with that rhythm rather than against it — taking the win, consolidating, and withdrawing before the wheel turns. The overreacher mistakes a moment of strength for a permanent condition and is punished when conditions change, as they always do. The discipline is to treat victory not as license but as a moment requiring even more clarity than struggle, because it is precisely when you feel most invincible that you are most exposed.