ill wind that blows no one any good, it's an

A loss or misfortune usually benefits someone. For example, They lost everything when that old shed burned down, but they got rid of a lot of junk as well--it's an ill wind. This expression appeared in John Heywood's 1546 proverb collection and remains so well known that it is often shortened. It also gave rise to a much-quoted pun about the difficulty of playing the oboe, describing the instrument as an ill wind that noboby blows good.