Keep your eyes on the stars, and your feet on the ground.
Source: This quote is on page: 17 of “Presidential addresses and state papers, Volume 15″ by Theodore Roosevelt.
Primary source: This quote was said by Roosevelt in a speech at a Prize Day exercises at Graton School, Graton Mass on May 19, 1904.
Complete Sentence: Be practical as well as generous in your ideals. Keep your eyes on the stars, but remember to keep your feet on the ground.
Disputed: Authority of this quote is disputed as this quote was said by Roosevelt in 1904, but the earliest source found for this quote is “Chironian: Volume 16″ (1899); page: 250.