What idioms are there to describe people's very sad mood? What idioms and poems describe the true feelings of the world?

Idioms to describe people's sadness:

Sad, sad, no anger, pain, sigh.

Heartbroken, heartbroken, depressed, Lacrimosa, crying.

Pessimism: refers to loss of confidence, disappointment, sadness and grief over inactivation.

Idioms describing the true feelings in the world are: share joys and sorrows, treat each other sincerely, live and die together, be inseparable, and blood is thicker than water.

Poems describing the true feelings in the world are:

The bright moon is in the sky, and at this time, the horizon is * *. -Zhang Jiuling

Knowing each other far and near, Wan Li is still a neighbor. -Zhang Jiuling

We met an old friend in another country after a long drought. Wang Zhu

You will know the pine and cypress when it is cold, and you will see the truth when it is difficult. -Anonymous

Goose feather sent from afar, a trifling present with a weighty thought behind it; It's not the gift that counts, but the thought behind it. -Xing Junchen Peach Blossom Pond is deeper in thousands of feet than in Wang Lun. -Li Bai's To Wang Lun?

Mochow has no confidant in the road ahead, and everyone knows you.