Lillian Kimball, The structure of the English sentence (1900)
“ This participle is sometimes used substantively; thus, “The loving are the daring.” “The slain were left to die.” Of course such a word as people is understood after these participles, and in analyzing these sentences it may be supplied if one so desires, but it is no more necessary than it is in the sentences,—“The good are happy, the righteous are blessed,” where a qualifying adjective is used as a noun.2. The participial phrase as a substitute for a proposition.—We come now to those frequent and important uses of the participle where it saves a predication. ”
