30 Mature and true citizenship; regard serving the society as a person's most important virtue. ——Suhomlinsky

31 What is an ideal, the revolutionary cause is an ideal; what is happiness, serving the people is happiness. ——Proverbs

32 We have enjoyed great benefits from other people’s inventions, and we should also be happy to have the opportunity to serve others with any of our inventions; and we should do this voluntarily and Do it generously. ——Franklin

33 Who is immortal who serves the great goals of the times and devotes his life to the struggle for the brotherhood of mankind. ——Nekrasov

34 The best thing about life is that when you stop living, you can still serve people with everything you create. ——Ostrovsky

35 The anchor is not afraid of burying itself. When people can't see it, that's when it's serving humanity. ——Plekhanov

36 You can find your own happiness in learning, in labor, in science, and in selfless service to the people. ——Telensky

37 The career of science is to serve the people. ——Tolstoy

38 The value of art and science lies in serving the interests of hundreds of millions of people without selfish desires. —— Ruskin

39 As long as we have the power to improve things, our first duty is to utilize it and train all our intelligence and abilities to serve our supreme cause as human beings. —— Huxley

40 The highest morality is to constantly serve others and work for the love of mankind. ——Gandhi

If you have any questions, you can continue to ask. I hope you will adopt them, thank you~