Mao sai tuo kai (pinyin: máOSèdüNKāI) is an idiom derived from historical stories, and the related allusions of idioms were first found in Mencius.
The original meaning of "suddenly" was that my heart was blocked by thatch, and now it suddenly opened (suddenly: blocked by thatch. Suddenly, immediately); After metaphor suddenly understand, understand. This idiom is often used as predicate, adverbial and attribute in sentences. With praise. Mostly used in written language. Also known as "suddenly open".
During the Spring and Autumn Period and the Warring States Period, there was a man named Gao Zi. Although he is smart and ambitious, he is lazy by nature. In the process of learning, he can't persevere and bear hardships and stand hard work. But fishing for three days and drying the net for two days, and my mood fluctuated, so I always failed. So Mencius came up with a way to educate him.
One day, Mencius took Gao Zi for a walk on the mountain in the suburbs. Mencius deliberately took him along a mountain road. Mencius asked Gao Zi as he walked, "Do you know how this road came?" Gao Zi replied, "People are out." Mencius said, "Yes, if someone is not afraid of the rugged mountain road, it will become a very spacious avenue."
Mencius took Gaozi to a weedy path and continued: "If there is a path that no one walks for a long time, then this road will be blocked by thatch as it is now. Now, thatch not only blocks this road, but also blocks your heart. "