2. It means: "There is no trace of birds in the sky", which means that the environment is quiet at this time, and birds are dynamic things. They will not stop flying because they all have their own directions and know where they should fly.
"But I have flown", a "Dan", shows that the "bird" in the previous sentence is metaphorical, and the author compares himself to a bird in the sky, which also has a profound and broad ideal and direction; Flying over describes the author's struggle for his goal.
3. Pay more attention to experience than results.
From Tagore's Birds
Birds is one of the masterpieces of Tagore, an Indian poet, and one of the most outstanding poetry collections in the world. It includes 325 beautiful untitled poems. Day and night, streams and oceans, freedom and betrayal are all integrated in Tagore's works. Short sentences express profound philosophy of life and lead the world to explore the source of truth and wisdom.
His poems shine with profound philosophical light like pearls, which not only arouses people's love for nature, human beings and all the beautiful things in the world, but also enlightens people how to persist in the ideal pursuit of real life and make the whole life full of joy and light. In his poetry creation, Tagore eulogized his sincere love for the people with a pure heart and expressed his praise for the beautiful things of the whole nature, the whole mankind and the whole universe.