Let us jump down to verse 36. This section that we just read is Peter pointing the finger at them and saying, "Look, God raised Jesus up to preach a message, to do these signs before you so you would know who He was, and you turned around and killed Him. But that did not stop God because God raised Him up. And now He abides in heaven at the throne of God."
They just killed their God. Can you imagine the feelings of guilt they felt? They had been out there in the crowd saying, "Barabbas, Barabbas! Crucify Him, crucify Him!" And now Peter turns all that back on them. You guys sinned. It was not just any sin; it was Deicide. Could you imagine?! They had killed their Savior. They had killed their Messiah, their God and King, whom they thought they worshipped, you know, throughout the Old Testament period. But it came down to them when He appeared, and they killed Him. So their question obviously is logical here. What can we do about this? Is there a way for this to be fixed? What does that mean for us? Are we doomed to death? And luckily (luckily is not the word) Peter had an answer, a good answer, a biblical answer, an answer from God.