The greatest happiness that everyone can get is one of the greatest happiness that everyone can get. Zola
True happiness can only be realized when you truly realize the value of life. Munir? Nasuf
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
Take the happiness of others 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
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
Even if you become a handful of dirt, it is the greatest happiness as long as you lay it on the road to truth and let your partner stride over it. Wu Yunduo
The purpose of all human efforts is to obtain happiness. Irving
There is only one revolutionary, whether he is alive or dead, who can give everyone happiness. -Lu Xun
Cattle eat grass and horses eat food. 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
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