(idiom) something that seems terrible, but actually produces positive results
A: I heard you failed your Medical school exam.
B: Yeah, but I think it was a blessing in disguise.
A: Why do you think that?
B: I decided that I don’t want to be a doctor. I want to be a dentist instead! I love teeth!
When my father got arrested for drunk driving, it was a blessing in disguise, because he realized for the first time that he was an alcoholic. Now he no longer drinks!
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