梦游天姥吟留别 by
李白 (Li Bai, Tang dynasty, c. 746), written as he left
东鲁 for his southern travels after being dismissed from court. Closes with the famous roar:
安能摧眉折腰事权贵,使我不得开心颜 ('How can I stoop and break my back to serve the powerful, and lose the smile from my face!')