Born in sorrow and died in happiness.

business women don't know how to hate national subjugation, but they still sing backyard flowers across the river. Du Mu's "Bo Qinhuai"

The sword front is honed, and the plum blossom fragrance comes from bitter cold. The diligent article of "Warning the World"

A strong grass is known by a high wind, but it withers when it is cold in the old age. The biography of Wang Ba in the later Han Dynasty

Industry is good at diligence, but it is barren at play.

Cold water boils frog effect.

Happiness depends on misfortune, and misfortune pays for happiness

The following answer is transferred from others:

Wei Zhi: "Be prepared for danger in times of peace, avoid extravagance and save", "Thinking about danger is safe, thinking about chaos is cured." Yi Yu can die "

Wei Jiang:" Be prepared for danger in times of peace ",thinking is prepared, and being prepared for trouble"

Li Shangyin: "Looking at the sages and families in the past, the reason for the failure is thrift and extravagance"

Zhou Wenwang: "A gentleman is safe without forgetting danger, but not forgetting death, and governing without forgetting chaos is to protect himself and the country.