It embodies the philosophy that no matter what difficulties we encounter in life, we should treat them with optimism and open-mindedness.
The poet deeply understands that the essence of autumn sadness in ancient times is that people with lofty ideals lose their ambition, are disappointed with reality, and are pessimistic about the future. Therefore, in autumn, they only see depression and feel lonely and lifeless. The poet sympathizes with their experiences and situations, but disagrees with their pessimistic and disappointed emotions. In response to this feeling of loneliness, he said that autumn is better than spring when all things sprout and flourish, emphasizing that autumn is not lifeless, but very lively. He guided people to see the crane with its wings fluttering high, pushing away the clouds in the clear autumn sky, looking vigorous and vigorous, working hard and displaying its great ambitions. Obviously, this crane is unique and alone. But it was the tenacious struggle of this crane that broke through the chilling atmosphere of autumn, opened up a new dimension to nature, and invigorated the spirits of the patriots. This crane is the incarnation of an unyielding warrior and the embodiment of the spirit of struggle. Therefore, the poet said, "It leads the poetic sentiment to the blue sky." "Poetry expresses ambition", and "poetry" means ambition. If a person is truly ambitious, he will have a fighting spirit and will not feel lonely. This is the theme of the first poem.