After confronting the crowd with their role in Jesus' death, Peter pivots to grace: they acted in ignorance, and God used their worst moment to fulfill his plan. The prophets foretold the Messiah's suffering, and now repentance opens the door to refreshment from God's presence. Peter connects Jesus to Moses' prophecy of a prophet like him, one whom Israel must listen to or face being cut off from God's people. This sermon weaves judgment and invitation together: the promises to Abraham are being fulfilled right now, and Jesus came first to the Jews to bless them by turning them from wickedness. Peter presents repentance not as shame management but as the pathway to times of refreshing and participation in God's unstoppable rescue plan for all nations.