2 And the twelve summoned the full number of the disciples and said, "It is not right that we should give up preaching the word of God to serve tables.
5 And what they said pleased the whole gathering, and they chose Stephen, a man full of faith and of the Holy Spirit,
8 And Stephen, full of grace and power, was doing great wonders and signs among the people.
10 But they could not withstand the wisdom and the Spirit with which he was speaking.
Stephen was in a position of service, yet he was full of grace and power and we know that his words pierced the religious leaders to the point that he was stoned. You don't have to be the pastor or a teacher you just need to be full of faith and the Holy Spirit.