2. Nature trapped people in darkness, forcing people to yearn for the light forever. -Goethe
Difficulties are both bad and good. Difficulties will force people to think of ways, and tough environment can cultivate talents. -Xu Teli
4, people have reached the end of their tether, and being able to extricate themselves is not cowardice! -Xu Beihong
Nothing is difficult in the world, as long as you are willing to climb. Mao Zedong
6. There is no royal road to science, and only those who do not dread the fatiguing climb along steep mountain roads can hope to reach the glorious summit. Marx
7. What is a road? That is to say, there is no way to step on it, and there is no way to develop it from a place where there are only thorns. -Lu Xun
8. Fame and fortune are mostly poor and neutral, and disasters often start from cleverness. -Lu you
9. The most terrible enemy is that there is no firm belief. -romain rolland
10, once you choose the road of life, you must bravely go to the end and never look back. Zola
1 1, I want to hold my destiny by the throat. -Beethoven
12. Although there are dark clouds in the sky, there is always the sun shining on them. Ayako Miura
13, the most difficult time, that is, not far from success. -Napoleon
14, suffering is the stepping stone to genius. -Balzac
15, you have to experience pain to realize the happiness of life. -Dumas