The person God uses must be faithful. Stephen was a man full of wisdom and the Holy Spirit, and full of faith (see Acts 6:1–7). But the apostles didn't ask him to go out and do miracles and then preach the gospel to the Sanhedrin. What was his job? He was chosen to serve the church by waiting on tables. It was hard work, but that is what Stephen did.
Diligently, Stephen waited on the Lord. And as the Lord found him faithful in the little things, He gave him more responsibilities. We can never be too small for God to use—only too big. God posed this question to Zechariah: "For who has despised the day of small things?" (Zechariah 4:10). We need to be faithful in doing what God has set before us, because if we are not faithful in the little things, then we won't be in the big things.
Jesus told the story of a wealthy man who went on a journey (see Matthew 25:14–30). As he left, he called his servants and gave to each of them a small amount of money. He told them to invest it while he was away. Two of the three servants did invest the money, and it multiplied. To those two faithful servants the master said, "Well done, good and faithful servant; you were faithful over a few things, I will make you ruler over many things. Enter into the joy of your lord" (Matthew 25:21).
Notice that those who were faithful were rewarded accordingly. But notice one more thing: their rewards were more opportunities to serve. If you are faithful in the little things, God will give you other opportunities to do greater things.