Acts 2:22

“You men of Israel, hear these words. Jesus of Nazareth, a man approved of God to you by mighty works and wonders and signs which God did by him in the midst of you, even as you yourselves know,”

Having commenced with the prophetic word from the Old Testament he moves on to the second stage of the Apostolic message, a description of the life and death of Jesus, and what has followed. They had recently seen the mighty works, and wonders, and signs, when Jesus of Nazareth had walked among them. They all of them knew about them. These evidenced that God had worked through Him, and had thus approved Him. Let them then remember what they had heard and seen.

‘Mighty works and wonders and signs.' The threefoldness stresses the completeness of His ministry looked at from three aspects. He had done mighty works, the works of God (John 5:17). He had cast out evil spirits. He had healed the sick in large numbers. He had raised the dead. By this it could be seen that God was active on earth. But these were also wonders. They had revealed His extraordinary power, especially when amalgamated with his miraculous feeding of the crowds and His control over wind and wave. None could explain them, ‘for no man can do those signs which you do except God be with Him' (John 3:2). And this leads on to the fact that they were signs of the presence of the Messiah, for, as He had gently pointed out to a despairing John (Matthew 11:4), they fulfilled all that the prophets had promised (Isaiah 32:1; Isaiah 35:5; Isaiah 61:1)