To profit from a misfortune 因祸得福
A man was a butterfingers（手脚笨拙的人）. He had been suffering from unemployment for months.
At last he found a job in a chinaware house. He had worked only a few days when he dropped a large vase.
The manager summoned him to the office and told him that money would be deducted from his wages every week until the vase was paid for. He asked: "How much did it cost?" "Five hundred dollars." said the manager. "Oh, that's wonderful," he said happily, "I'm so happy that I have got a steady job at last."