blessing in disguise

(idiom) something that seems terrible, but actually produces positive results

Example Sentences:

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!

From the News:

Severity of crisis could be blessing in disguise

Media:

Similar idioms:

1. dodge a bullet
2. the pot calling the kettle black
3. cut one’s teeth