The poetry of Sturm und Drang is less accomplished than the drama, but because Herder called it "the source of literature", it theoretically elevated the genre's status. The characteristic of Sturm und Drang poetry is that it emphasizes the expression of personal life feelings. The initial achievement was the lyric poems of Goethe's youth that expressed personal feelings and natural beauty in folk song-like language. His "Prometheus" is a representative ode to Sturm und Drang. The "G?ttingen Forest School" founded in 1772 was the center of Sturm und Drang poetry creation. The spiritual mentor of these poets was Klobstock, and the name of their organization came from one of his poems "Hills and Woods". Famous members include Boyer, Johann Friedrich Han, Hull Tee, Lezewitz, Miller, Foss and Stolberg brothers, etc. Their poetry expresses some kind of revolutionary aspirations and prophecies of changing reality. Bilge was a ballad poet with outstanding achievements in Sturm und Drang. Although he did not belong to the "Lin Yuan School", he had close contacts with the "Lin Yuan School" poets. His poems such as "The Peasant to His Royal Highness the Tyrant" (1773) express the theme of anti-oppression. Another important poet is Schubart from southern Germany. He was imprisoned by the Archduke of Württemberg for 10 years because of his radical political attitude. While imprisoned, he also wrote "Royal Chamber" (1780), expressing his contempt for the tyrannical monarch. "Song of the Cape", written in 1787, is a farewell poem dedicated to the laborers who were sold to South Africa. It accuses the feudal monarch of the crime of selling his subjects.