In God's kingdom, calling trumps credentials every time! God does not call the qualified. He qualifies the called. And the litmus test isn't experience or expertise. It's availability and teachability. If you are willing to go when God gives you a green light, He will take you to inaccessible places to do impossible things.
Mark Batterson, All In: You Are One Decision Away From a Totally Different Life
availability, calling, teachability