1 Samuel 16:7 – “But the Lord said to Samuel, “…. For the Lord sees not as man sees; man looks on the outward appearance, but the Lord looks on the heart.””
In the Bible, there are different occasions where God used the weak to shame the strong (1 Corinthians 1:27) for His own glory. David the shepherd boy, being the youngest son of Jesse, was basically given the job of tending for the sheep and running errands like sending food to his valiant brothers who served in Saul’s army. God sent Samuel the prophet to anoint David as the king of Israel after Saul, though he did not have the stature or physical appearance as his brothers.
Jesus chose His disciples who were fishermen and tax collectors by trade. Jesus could have chosen rabbis for His ministry work, instead of selecting people of lesser significance.
God always tests the heart of His people. He accepts people with a humble and contrite heart. We may not have the qualifications or earthly pleasures that others have to boast, but through humility God can lift us up. He can make us productive for His Kingdom.