Throughout scripture, you can see a pattern in the way that God works. He doesn't look for the powerful, the rich, or the famous. It's not that He can't use those people, but as Pastor Ricky points out in the example of Jesus's mother Mary, God chose her because she was humble.  She was a nobody and God loves to work with nobodys.  When you acknowledge that you're incapable and incompetent on your own, it allows room for God to come in and work in a way that glorifies Him alone.