Saul answered, “Am I not a Benjaminite, from the least of the tribes of Israel? And is not my clan the humblest of all the clans of the tribe of Benjamin? Why then have you spoken to me in this way?”
1 Samuel 9:21 ESV

God often works through ordinary circumstances to accomplish His purposes. It's easy to think that God can't use us in big ways but if we are open and receptive to his will and purpose, anything can happen.