1. Gratitude is a spiritual treasure. ——Locke

2. Gratitude is the health of the soul. ——Nietzsche

3. Without gratitude, there is no real virtue. ——Rousseau

4. The most beautiful scene in the world occurs when we miss our mother. —— Maupassant

5. The main reason why family is important is that it allows parents to gain emotions. ——Russell

6. The virtue of parents is a huge wealth. ——Horace

7. How similar mothers are all over the world! Their hearts are always the same, they both have an extremely pure and innocent heart. ——Whitman

8. The kindness of parents cannot be drowned in water or extinguished by fire. ——Proverb from the former Soviet Union

9. Only when you raise a son do you know how hard your mother is, and when you raise a daughter do you know how grateful you are to your mother. ——Japanese proverb

10. Ingratitude is worse than lying, vanity, gossip, drunkenness, or other evils that exist in the hearts of vulnerable people. ——British proverb

11. An ungrateful person cannot be saved if he is in trouble. ——Greek proverb

12. No matter how proud a person is of his achievements, he should drink water and think about the source. He should remember that it was his teacher who sown the original seeds for their growth. ——Madame Curie

13. A drop of kindness should be repaid by a spring.

14. Fish know the kindness of water, which is the source of happiness.

15. Sheep have the kindness of kneeling down to breastfeed, and crows have the kindness of feeding back.