New Defender's Study Bible Notes
4:2 through Jesus the resurrection. The authorities tried in every way to stop the spread of the Christian faith, especially “being grieved” at the preaching of the resurrection, since so many were believing it (Acts 4:4). They could have stopped the spread of the faith easily, of course, merely by producing and displaying the dead body of Jesus. This they could not do, however, because He had risen from the dead and ascended to heaven! Their inability to produce His body is thus one of the “many infallible proofs” (Acts 1:3) of His bodily resurrection. They would surely have done this if they could.