Books
In war, the way is to avoid what is strong and to strike at what is weak.
— Sun Tzu ‧ The Art of War

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker advises that success in conflict comes from sidestepping strength and attacking vulnerability. Rather than meeting an opponent where they are best defended, one should look for the gap. It is a principle of efficiency: force is spent where it will have the most effect.
Context reviewed