American President Roosevelt's home was stolen and his property suffered heavy losses. When a friend heard the news, he wrote to comfort him and advised him not to take it to heart. President Roosevelt quickly wrote back and said, "Dear friend, thank you for your letter to comfort me. I'm all right. I think I should thank God, because: first, I lost only my property, but people were unscathed; Second, I just lost part of my property, not all of it; Third, fortunately, the thief was that person, not me ... "I tried my best to die. (Zhuge Liang's "Model")

Crows have the intention of feeding back, and sheep know the grace of kneeling and nursing.

A drop of grace will be rewarded by a spring.

Grass can't repay the kindness of warm sun.

Bees suck honey from flowers and thank campers when they leave. The grandiose butterfly thinks that flowers should thank him. Tagore

People help me and don't forget; I help people, remember. -Hua

Every favor has a barb, which will hook the mouth that devours it, and the benefactor can drag it wherever he wants-Don.

Ingratitude is worse than lying, vanity, rap, drunkenness or other evils that exist in the hearts of vulnerable people-English proverb

Mean people are always ungrateful: ingratitude is part of meanness-Hugo

An ungrateful person is hopeless if he is in trouble-Greek proverb

If a person suffers great compassion and then turns against his benefactor, he must take care of his own dignity and be more vicious than an irrelevant stranger. He must prove the guilt of the other party to explain his ruthlessness-Thackeray.