The phrase "knowing the world is so unsophisticated" comes from Guiguzi, the founder and strategist of Guiguzi School. The original words are: "Knowing the world is so unsophisticated, smooth and true, and everyone who knows it is wise."
The famous aphorism related to it is Lu Xun: The world is really a difficult place. It is not a good word to say that a person is "unsophisticated", nor is it a good word to say that he is "sophisticated". Balzac: There are no principles in the world, only the world, no rules, only the status quo. Smart people integrate into the world and the status quo and dominate at will. Chesterfield: The absurd idea of inexperienced and methodical people is that they don't like the patience of sophisticated people.