文学王国维在《人间词话》中提出,古今成大学问者必经的三重境界:“昨夜西风凋碧树。独上高楼,望尽天涯路。”此乃第一重境界。“衣带渐宽终不悔,为伊消得人憔悴。”此乃第二重境界。“众里寻它千百度,蓦然回首,那人却在灯火阑珊处。”此乃第三重境界。 Literature Wang Guowei put forward in the “Human Words”: The triple realm of the questions asked by the ancient and modern universities: “Last night, the West Wind littered the trees. It was the tallest building on the night that looked like the End of the World Road.” This is the first realm. “The widening of the belt does not regret it, but it is for the Iraqi people.” This is the second realm. “The crowd searched for it, and when you look back, the man is in the dim light.” This is the third realm.