You men of Israel, hear these words; Jesus of Nazareth, a man approved of God among you by miracles and wonders and signs, which God did by him in the midst of you, as you yourselves also know: (Acts 2.22)
Here Peter makes it absolutely clear on the day of Pentecost that Jesus was a man. Furthermore, he says that Jesus was a man approved by God. Then he goes on the say that the miracles and wonders and signs that were worked were done by God. The primitive church started with the man and went on to recognize that Jesus was also God. This was natural to them. They would not have thought of approaching it any other way.
After all, Jesus came to them as a man, they lived with him and touched him and knew who he was. It was only centuries later when the councils of bishops were meeting to combat various heresies that they started with the God who had been recognized in Jesus and also gave assent to his humanity.
This stress on his humanity is what gave the early disciples the zeal and confidence they needed to “turn the world upside down.”(Acts 17:6) They were of the same humanity as Jesus. He did what he did by the Holy Spirit. So they believed that they, as possessors of this Spirit, could do the same things and even greater things.
