How can something be both God's definite plan and a crime committed by people? This verse tackles a tension that can feel impossible, but it's central to understanding Jesus' death.
Peter addresses the crowd directly, pointing out a profound truth: Jesus' crucifixion was not a cosmic accident. It was 'delivered up according to the definite plan and foreknowledge of God.'
This means God had a purpose, a detailed plan, that stretched back to before the creation of the world. He knew everything that would happen, and He ordained that this would be the way salvation would come.
But notice the sharp turn: 'you crucified and killed.' Peter doesn't let the divine plan obscure human responsibility. The very people he's speaking to, and those who acted with them, were the agents of this act. Their choices were real, their sin was real, and their hands were wicked.
The key here is that God's sovereign plan doesn't force people to sin. He works through the free, willing actions of humans – even their sinful choices – to accomplish His perfect will.