Johann Wolfgang von Goethe

From "Wilhelm Meister's Apprenticeship" - Book IV, Chap. XI

My grief no mortals know, Except the yearning! Alone, a prey to woe, All pleasure spurning, Up tow'rds the sky I throw A gaze discerning. He who my love can know Seems ne'er returning; With strange and fiery glow My heart is burning. My grief no mortals know, Except the yearning!