The call to be a missionary is as close as we get today to the life of the Apostles. Apostle means "sent ones" in the Greek. Gladys was a supremely effective missionary. If your life didn't start with a lot of promise, but you know God is calling you to something else, then listen to this brief and get inspired by how God used Gladys.
In the same way He used her though she was from very humble beginnings, He can use you.