Peter's sermon in Acts 3 confronts a crowd astounded by the healing of a lifelong lame man, redirecting their awe from the apostles to the divine power of Jesus Christ, whom they had crucified. He boldly declares that the miracle is not a result of human power or piety, but the sovereign work of God through faith in Jesus' name, emphasizing that the same Jesus they rejected and killed is now glorified as the Author of Life. With pastoral urgency, Peter calls the Jewish crowd to repentance, acknowledging their ignorance yet holding them accountable for their role in Christ's death, while affirming that salvation is found in no one else. The sermon underscores the centrality of Christ's crucifixion and resurrection as the foundation of both physical and spiritual healing, and it challenges all listeners—then and now—to examine their hearts, repent of unconfessed sin, and embrace faith in Jesus as the only way to God. Ultimately, the message is a call to spiritual awakening, rooted in the transformative power of God's Word and the promise of a new covenant written on the heart.