The supreme art
Sun Tzu's claim is that the highest skill is winning without fighting: position, timing and information beat raw aggression. A man who must brawl to get his way has already mismanaged the situation.
Know both grounds
Know yourself and know the terrain. Most male failure is not weakness — it is fighting on ground that favours someone else: a wrong job, a wrong argument, a wrong hour of the night.
Speed and restraint
The Art of War prizes brevity of conflict. Long wars drain the treasury. Applied to life: end disputes fast, do not keep grudges on payroll.