□ The greatest possible happiness for each individual is found in the greatest happiness achieved by all. ——Zola □ The happiest person is the person who can connect the end point and the starting point of his life. ── Goethe □ You understand that human life is neither as good nor as bad as people think. ── Maupassant □ Do you want to be a happy person? I hope you learn to bear hardships first. ── Turgenev □ Even if you turn into a handful of dirt, as long as it is paved on the road to truth and your friends can stride forward, it will be the greatest happiness. ——Wu Yunduo □ Happiness built on the pain of others is not true happiness. ──A. Babaeva □ The bounden duty of scientists requires us to continue to strive to completely reveal the mysteries of nature. Mastering these mysteries can benefit mankind in the future. ──Joliot Curie This article is reproduced from Soul. Please indicate the source for reprinting.