Where did the phrase "look up at the stars and keep your feet on the ground" first come from?

On May 4, 2010, the May 4th Youth Day, Premier Wen held a discussion with students in the Peking University Library.

On the May 4th Youth Day in 2010, when Premier Wen visited college students at Peking University, in the calligraphy and painting exhibition room of the Peking University Students’ Calligraphy and Painting Research Association, when Premier Wen slowly walked in, the students were very excited and everyone was excited. When thinking about what to write to Premier Wen, Li Danlin, president of the Student Calligraphy and Painting Club and a philosophy student, thought of Premier Wen's famous poem "Looking Up at the Starry Sky", and then wrote the four words "Looking Up at the Starry Sky" for Premier Wen. Big characters: After reading the calligraphy works of college students, Premier Wen smiled and said: "I am with the four characters above", so he wrote the four vigorous and powerful characters "down to earth" with his brushstrokes.

Extended information:

In the 2010 college entrance examination, a topic essay appeared - "Looking up at the stars and keeping feet on the ground". In the 2010 college entrance examination essay question in Beijing, many people immediately thought of a poem "Looking Up at the Stars" written by Premier Wen. This poem was also selected as the school song of Beihang University. The eight characters "looking up at the stars" and "down to earth" express Premier Wen's high expectations for young college students. They should not only have lofty ideals and lofty pursuits in their hearts, but also be pragmatic, start from small things, and guard against arrogance. Stay away from impatience. This is the title of the Beijing College Entrance Examination, which has far-reaching practical significance.

Reference: Baidu Encyclopedia-Looking up at the stars and down to earth