1. the old man lost his mare, but it all turned out for the best (idiom); fig. a blessing in disguise; it's an ill wind that blows nobody any good; also written 塞翁失馬焉知非福|塞翁失马焉知非福

   trad. 塞翁失馬安知非福

Also written 塞翁失馬安知非福【sài wēng shī mǎ ān zhī fēi fú】