1. Work hard and die. 2. Crows have the meaning of feeding back, and sheep know the kindness of kneeling to breastfeed. 3. A drop of kindness should be repaid by a spring. 4. Whoever cares about an inch of grass will be rewarded with three rays of spring. 5. Being a human being is like a candle, it has some heat and some light, giving people light and warmth. ——Xiao Chunu Life needs a grateful heart to create, and a grateful heart needs life to nourish. ——Wang Fu 6. Don’t forget the person who dug the well when you are drinking water. The people in the past planted trees and the people in the future can enjoy the shade. 7. There is no greater kindness than knowing how to repay kindness. 8. Every favor has a barb, which will catch the mouth that swallows the favor and drag it wherever the benefactor wants. ——Tang En 9. Ingratitude is more powerful than lying, vanity, talking, drinking, or other evil qualities that exist in the hearts of fragile people. ——British proverb A mean person is always ungrateful: Ungratefulness is a part of being mean. ——Hugo 10. An ungrateful person cannot be saved when he is in trouble. ——Greek proverb