The edge of the sword comes from sharpening, and the fragrance of plum blossoms comes from bitter cold. Diligent chapter of "Warning Sages"
A high wind knows that the grass is strong, and the age is cold and dry. The Biography of Wang Ba in the Later Han Dynasty
Diligence is good at diligence, but not good at playing.
Frog effect of boiling cold water.
Happiness is what disasters depend on, and disasters are what blessings pay.
The following answers were transferred from others:
Wei Zhi: "Be prepared for danger in times of peace, avoid extravagance and thrift", "Be prepared for danger; If you want to mess up, you will be cured; If you think of death, you will be saved. "
Confucius said, "Peace without forgetting danger, survival without dying, and governance without forgetting chaos."
Ouyang Xiu: "Worry and fatigue can rejuvenate the country, and leisure can die."
Jiang Wei: "'Be prepared for danger in times of peace', and be prepared for danger."
Li Shangyin: "Looking back at the country and home of the sages, we turned from frugality to luxury. "
Zhou Wenwang: "A gentleman can live in peace without forgetting danger, live without forgetting death, and govern without forgetting chaos, which is the person who can be prepared for danger in times of peace and protect the country."
Don't forget the danger, the prosperity will be worried about the decline. -(Hanshu)
After the success of luxury, happiness is stable and misfortune is doubled-Wang Anshi
Peace without forgetting danger, survival without forgetting death, and governance without forgetting chaos-the Book of Changes.
If a man takes no thought about what is distant, he will find sorrow near at hand. -The Analects of Confucius