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