What idioms, proverbs or poems are there to express the coldness of the world and the warmth of human feelings?

Idioms, proverbs or poems that express the coldness of the world and the warmth of human feelings are as follows:

Human feelings are weak, the world is cold, and only icing on the cake, who wants to send charcoal in the snow!

Human feelings are as thin as paper and things are as new as chess. The poor live in downtown areas, but the rich have distant relatives in the mountains.

As long as you compare the true feelings of this close friend with the cruelty of this world, you will suddenly realize.

Human feelings are as thin as paper, and a wide face changes, and the world is everywhere.

Human feelings are as thin as paper and things are as new as chess. The poor live in downtown areas, but the rich have distant relatives in the mountains.

Your adoption is the greatest encouragement to me. thank you