① Ancient poems and famous aphorisms:

(Ancient Chinese poems) There is no way out despite the mountains and rivers, and there is another village with dark flowers and bright flowers. ——[Song Dynasty] Lu You

(Modern Chinese Poetry) The majestic pass and the long road are really like iron, but now we are crossing them from the beginning. ——Mao Zedong

(Quotes from modern foreign celebrities) The most difficult time is when success is not far away. ——[France] Napoleon

(Aphorisms from modern foreign celebrities) Only pain can lead to joy. ——[Germany] Beethoven

②Reason:

The philosophy contained in it is "No matter how difficult it is to navigate the road ahead, or how many difficulties and obstacles one encounters in life, as long as one has firm belief , if you have the courage to explore, you will be able to "survive from desperate situations" in life, and a new realm full of light and hope will appear, which is consistent with the meaning of the title.

The thoughts and feelings expressed are "the heroic spirit of the Red Army who despised difficulties, dared to fight against them and was able to overcome them", which is consistent with the meaning of the title.

The extended meaning is "As long as you continue to persist and work hard in a difficult situation, you will achieve success", which is consistent with the meaning of the question.

It means "only by experiencing pain can you taste the taste of joy", which means to teach people not to give up in suffering, which is consistent with the meaning of the title.