One of the things I love most about Christianity is that God specializes in doing extraordinary things through ordinary people. A shepherd boy becomes king. A pregnant teenager becomes the mother of God. An uneducated fisherman becomes the chief apostle. The same is true for us.
Stearns says that 'no other person has our same abilities, motivations, network of friends and relationships, perspectives, ideas, or experiences.' God specializes in using us in all of our uniqueness.
There are two biblical stories that illustrate this well. You can read about the feeding of the five thousand here, here, here, and here (it's one of the few stories recorded by all four Gospel writers). And you can read about the rebuilding of the Jerusalem wall here.
In both stories, ordinary people were used to do extraordinary things.
They weren't asked about the magnitude or strategy or feasibility of what they had to offer. They were just asked to simply give what they had. And then the God who specializes in doing extraordinary things through ordinary people also specializes in doing the impossible.