Those quotes are literally from a book called, "The Art of War." I read the entire thing. All the chapters are about war.
And if you just saw the name of the chapters, it is obvious all of it pertains only to war and nothing more.
As well, major portions of the book don't even come from Sun Tzu. There are a LOT of Chinese generals who took the book and edited it themselves. I have doubts if ANY of it is from Sun Tzu.