18. You should not rush for success. You should be familiar with your research objects and persevere. Time will make everything happen. The hardest thing is to get started, but the hardest thing is to end well. ——Shakespeare

19. Laziness is punished not only by its own failure, but also by the success of others. ——Jules Renard

20. The secret of success-it is very simple. No matter when or how, I will never allow myself to be a little discouraged. ——Edison

21. The experience and gain that failure brings to me is that I already know that this will not succeed, and I can avoid the same mistake next time. ——Edison