Remember Rhoda?

In case you don't (remember Rhoda that is), she was the servant girl who answered the door after Peter was rescued from prison by an angel (Acts 12). She literally was so excited -- she left him standing at the door to tell everyone else. And not surprisingly no one believed her, until Peter kept knocking at the door.
My guess is everyone looked at Rhoda, a nice (but somewhat ditzy) servant girl and said, "She'll never be important." Maybe she even thought, "God can't use me -- I am not (connected enough, smart enough, rich enough, the right sex, or the best occupation)."
But God said, "I am going to use her. People will hear about her for 1000s of years and know -- I can use them too."