This is an China proverb.
These two and a half sentences are not from the same place.
Knowing pines and cypresses when you are cold comes from the pre-learning in The Analects. The original sentence is "Know pine and cypress when it is cold".
A friend in need is a true friend, from the tenth time in Drunken Stone (Konou in East Shandong in Ming Dynasty): "Pukou is a friend in need. Today, my brother will see him for us, and we will see him another day. " Later, the folk derived the saying that "a friend in need is a friend indeed".
You will know the pine and cypress when it is cold, and you will see the truth when it is difficult. A man knows his companion in a long journey and an inn.
And the original sentence of "high winds know the strength of grass" is
The high wind knows the strength of grass, and the board swings to know the sincerity of ministers. The brave know justice in peace, and the wise will be merciful. (Don Li Shimin, "To Xiao Yu")
This poem is an ancient poem, not written by Li Shimin. Su Yang rebelled against Yang Liang, the younger brother of Yang Di, who had just ascended the throne. These two poems were also quoted in the "thank you letter". Sui Shu Yang Suchuan: "Emperor Yang Di wrote a letter to Lao Su, which attracted an ancient saying:' A strong grass knows a high wind, and there are loyal ministers in troubled times." "Loyal ministers are loyal ministers, and they are all taboo.
A high wind knows that the grass is strong, and the age is cold and dry. (Biography of Ye Fan, History of the Later Han Dynasty and Wang Ba).
Princess Linzi, "Knowing Poetry with Dugumu"
Jiangdu was in chaos, and there were many soldiers in the army. Wolf down, war.
Inverse acts opened the city from outside to midnight. Blood-soaked palace, knife and gun leaning on the eaves.
Today, it is Volkswagen and Daqing who know what to do. The white blade pollutes the yellow family, and the state family falls.
A high wind knows a strong grass, and a loyal minister is known in troubled times. Mourn the lonely, death is a knot.
Heaven and earth are swaying, and clouds and thunder are not constant. It's been 200 years, and you're still not at peace.
The mountains and rivers are beautiful, and the graves are exposed to smoke. A gentleman holds his father's virtue, loyalty and heroism.
Earth room is proud of Huaxuan's patronage. My husband insisted on doing it, and he didn't feel his feelings.