II. The ministers went on in their work with great vigour and success (v. 33): With great power gave the apostles witness of the resurrection of the Lord Jesus. The doctrine they preached was, the resurrection of Christ: a matter of fact, which served not only for the confirmation of the truth of Christ's holy religion, but being duly explained and illustrated, with the proper inferences from it, served for a summary of all the duties, privileges, and comforts of Christians. The resurrection of Christ, rightly understood and improved, will let us into the great mysteries of religion. By the great power wherewith the apostles attested the resurrection may be meant, 1. The great vigour, spirit, and courage, with which they published and avowed this doctrine; they did it not softly and diffidently, but with liveliness and resolution, as those that were themselves abundantly satisfied of the truth of it, and earnestly desired that others should be so too. Or, 2. The miracles which they wrought to confirm their doctrine. With works of great power, they gave witness to the resurrection of Christ, God himself, in them, bearing witness too.

Matthew Henry Commentary on the Whole Bible (Concise) (Matthew Henry)

Verses 32-37 The disciples loved one another. This was the blessed fruit of Christ's dying precept to his disciples, and his dying prayer for them. Thus it was then, and it will be so again, when the Spirit shall be poured upon us from on high. The doctrine preached was the resurrection of Christ; a matter of fact, which being duly explained, was a summary of all the duties, privileges, and comforts of Christians. There were evident fruits of Christ's grace in all they said and did. They were dead to this world. This was a great evidence of the grace of God in them. They did not take away others' property, but they were indifferent to it. They did not call it their own; because they had, in affection, forsaken all for Christ, and were expecting to be stripped of all for cleaving to him. No marvel that they were of one heart and soul, when they sat so loose to the wealth of this world. In effect, they had all things common; for there was not any among them who lacked, care was taken for their supply. The money was laid at the apostles' feet. Great care ought to be taken in the distribution of public charity, that it be given to such as have need, such as are not able to procure a maintenance for themselves; those who are reduced to want for well-doing, and for the testimony of a good conscience, ought to be provided for. Here is one in particular mentioned, remarkable for this generous charity; it was Barnabas. As one designed to be a preacher of the gospel, he disentangled himself from the affairs of this life. When such dispositions prevail, and are exercised according to the circumstances of the times, the testimony will have very great power upon others.