Acts 10:39,40 - We are witnesses of everything He did

10:39

One of the key qualifications for being an apostle was to be a witness of the events in Jesus' life, especially the resurrection (Acts 1:21,22), Peter was such a witness. “They killed Him by hanging Him on a cross”. Some people get uneasy about references to the Jews killing Jesus. It is not quite so explicit here, “they '' could be very general, but possibly refers to the Jewish religious leaders, elsewhere it is more explicit. The uneasiness comes because of fears of anti-semitsm, and there have been horrendous acts carried out against the Jews, even by so-called Christians, at various points in history. So let’s look at the matter in a little more detail. First of all, the gospel accounts seem to put equal blame on the Jewish authorities and on the Roman authorities. Secondly, it is a matter of historical accuracy that the Jewish authorities played a big role in the crucifixion of Jesus. Now if we look at the New Testament as a whole, the reason Jesus died was to pay the price of our sins. You and I are responsible for His death, because He died for our sins. We are all responsible. 

10:40

“But God raised Him from the dead on the third day and caused Him to be seen”. Jesus did die, but He did not remain dead, He was raised to new life. And there were physical witnesses to this fact. The resurrection is not a metaphorical thing, but a physical reality. And this was a central part of the preaching of the early church. If there was no resurrection then there was no point.