After Sunday finished speaking, he rested his chin on one hand and left Xue Qinghe undisturbed, allowing him to ponder the reasoning for himself.
In truth, despite saying so much, he had mainly been explaining just one thing: parallel spacetime theory.
But for a native like Xue Qinghe, explaining it in those terms might only leave him unable to understand.
Sunday could only guide him gradually through other principles, helping him understand the reasoning behind it.
"Sir, do you mean that the so-called Outer Heavenly Demons are called that because their arrival changes the course of the continent's future?"
Xue Qinghe now understood what Sunday meant, and he was rather surprised. After all, in all the years of the Douluo Continent's history, no one had ever proposed such a theory.
Sunday nodded at his words.
"Exactly. To put it simply, it's like flipping through a book. The same sentence is copied onto every page, but whenever you turn a page, you discover that the handwriting is different.
"To take it a level deeper, this is parallel spacetime.
"We can imagine that the universe began as a point. As that point moves forward, it forms a line. This is the beginning of time.
"With a before and an after, there are nodes, and between those nodes is time. As the nodes move, they continually stretch and split, forming a plane.
"And that plane is space. This is what we call spacetime.
"When countless timelines split to form countless spaces, each space develops an entirely new worldline.
"Perhaps you took a carriage to the Imperial Palace to see Cao this morning, and in this world, you entered the Imperial Palace without any trouble.
"In another world, you boarded the carriage only for a wheel to break, leaving you to walk. Or perhaps