1, what a magnificent cause and great purpose to work hard for the happiness of mankind! -Saint-Simon

The greatest happiness that everyone can get is one of the greatest happiness that everyone can get. Zola

Real happiness can only be realized when you really realize the value of life. Munir nassouf

4. Happy are those who are interested in research! Newcomers who can get rid of delusion and vanity through research are happier. -Teri in Latin America

5. Take others' happiness as your own happiness, give flowers to others and keep thorns for yourself! Valdes

As long as you have a reasonable thing to do, your life will be particularly beautiful. -Einstein

7. Science is by no means a selfish pleasure. Those who are fortunate enough to devote themselves to scientific research should first serve mankind with their own knowledge. Marx

8. Even if you become a handful of dirt, it is the greatest happiness for your partner to stride forward as long as it is paved on the road to truth. Wu Yunduo

9. The purpose of all human efforts is to obtain happiness. Irving

10, the only revolutionary, whether he is alive or dead, can give everyone happiness. -Lu Xun

1 1. Cattle eat grass and horses eat feed. Cattle enjoy the least and contribute the most, so it is best to be a scalper. I am willing to be an old ox for the party and the people all my life. -Wang Jinxi

12, people get happiness in performing their duties. It's like a person carrying something on his back, but his heart is very comfortable. If people don't do their duty without it, it's like driving an empty car, that is, it's a waste. Rozov

13. My art should only benefit the poor. Ah, what a happy moment! How happy I should be to be close to this! -Beethoven

14, is creating, or is planning to create in the future. This is a necessity: happiness can only exist when this necessity is satisfied. -romain rolland

15, the more happiness is shared with others, the more its value increases. Seiichi Morimura

16, it is the unshirkable responsibility of scientists to call on us to continue our struggle, thoroughly expose the mysteries of nature, master these mysteries, and benefit mankind in the future. -Aurio Curie.

17, only the happiness of all mankind is your happiness. -Dietzgen

18, if happiness lies in physical pleasure, then it should be said that cows are happy to find forage to eat. Heraclitus

19, if one day, I can contribute to our public interests, I will consider myself the happiest person in the world. Nicola Nikolai Gogol

20. Personal bitterness and happiness must be integrated into the bitterness and happiness of the times. —— Ai Qing

2 1, there are thousands of buildings in Ande, which greatly protect the poor in the world. -Du Fu

22. If a person has lofty ideals, he will feel happy even in the most difficult times. -Xu Teli

Of course, a writer must earn money for living and writing, but he should never live and write for making money. Marx