2:4 God also bearing [them] witness, both with {e} signs and wonders, and with divers miracles, and gifts of the Holy Ghost, according to his own will?
(e) This is the true purpose of miracles. Now they are called signs, because they appear as one thing, and represent another: and they are called wonders, because they represent some strange and unaccustomed thing: and powers because they give us a glimpse of God's mighty power.
2:4 God also bearing [them] testimony, etc. God bore witness to the truth of their words by the signs and wonders of Pentecost. He also bore witness afterwards by giving them miraculous powers, and by the extraordinary gifts of the Holy Spirit. Note that when he Law was given on Sinai God bore witness by signs and wonders. Also when the gospel, the message of Christ, was given on Mt. Zion God bore witness with signs and wonders.
2:4 By signs and wonders - While he lived. And various miracles and distributions of the Holy Ghost - Miraculous gifts, distributed after his exaltation. According to his will - Not theirs who received them.
2:1-4 Christ being proved to be superior to the angels, this doctrine is applied. Our minds and memories are like a leaky vessel, they do not, without much care, retain what is poured into them. This proceeds from the corruption of our nature, temptations, worldly cares, and pleasures. Sinning against the gospel is neglect of this great salvation; it is a contempt of the saving grace of God in Christ, making light of it, not caring for it, not regarding either the worth of gospel grace, or the want of it, and our undone state without it. The Lord's judgments under the gospel dispensation are chiefly spiritual, but are on that account the more to be dreaded. Here is an appeal to the consciences of sinners. Even partial neglects will not escape rebukes; they often bring darkness on the souls they do not finally ruin. The setting forth the gospel was continued and confirmed by those who heard Christ, by the evangelists and apostles, who were witnesses of what Jesus Christ began both to do and to teach; and by the gifts of the Holy Ghost, qualified for the work to which they were called. And all this according to God's own will. It was the will of God that we should have sure ground for our faith, and a strong foundation for our hope in receiving the gospel. Let us mind this one thing needful, and attend to the Holy Scriptures, written by those who heard the words of our gracious Lord, and were inspired by his Spirit; then we shall be blessed with the good part that cannot be taken away.