No one person or group could have made the first church. No heights of oratory, no flaming enthusiasm, could have awakened for Christ the thousands who were moved at the time, or produced the united life of the early church. … The Spirit did not descend upon the speakers in such a way that they preached a sermon or gave a speech to an unenlightened crowd. Instead, fiery tongues of the Spirit ate their way into the hearts of the hearers and inflamed the crowd in one common experience of the same spirit and the same Christ.

Source: “The Mystery of the Early Church