every cloud has a silver lining

The worst situation has some element of hope or some redeeming quality. John Milton appears to have been the originator of this metaphor, in Comus (1634): “A sable cloud turns forth its silver lining on the night.” It was adopted by numerous later writers and so was already a cliché by the time it appeared in the popular World War I song, “Keep the Home Fires Burning” (Ivor Novello and Lena Guilhert, 1915): “There’s a silver lining through the dark clouds shining.” Noël Cow- ard played on it in a song of the 1930s: “Every silver lining has its cloud.”