be careful what you wish for
The desired outcome may not be as desirable once it has been attained.
Don't think your dreams don't come true, because they do. You'd better be careful what you wish for. And I truly and honestly - one day I am doing the 'Beaver' show and I said, 'This is the show I have always wanted to do.' Barbara Billingsley
Be careful what you wish for because you will get it. Be even more careful what you work for because you will get it even more quickly. Colin Cunningham
One of the downsides of being famous is that folks pay far more attention to you than they should. American celebrities are constantly under surveillance, and every word they say is subject to scrutiny. So, be careful what you wish for if you desire fame. No human being should be a goldfish. Bill O'Reilly
I really would like to be involved in things and to understand things, and in some ways you've got to be careful what you wish for because I feel very, very blessed to have such an interesting life and to be able to have little snapshots of lives of people from many different parts of the world. Yo-Yo Ma
All great sci-fi is: Be careful what you wish for. Damon Lindelof
Be careful what you wish for you might get it. African American Proverb