Peter's Pentecost sermon, delivered in AD 31, carries a timeless message that resonates even on Pentecost in 1999. On that historic day, the signs of a rushing mighty wind, tongues of fire, and speaking in other languages attracted attention, confirmed God's Word through His servants, and bore pointed meanings of both blessing and destruction. These signs, symbolizing the Holy Spirit, also hinted at violence and calamity, reflecting a dichotomy of good and evil, life and death, as Peter understood them. They shook the crowd emotionally and spiritually, urging a choice between construction and destruction. Peter's sermon, addressed to the men of Judea, Israel, and brethren, unfolds in three distinct sections. Initially, he quotes Joel 2:28-32, extending beyond prophecy to declare that the great and notable day of the Lord has dawned with the giving of the Holy Spirit, marking a new era of divine intervention. He emphasizes that the time of judgment has begun, presenting a choice between salvation and wrath, with hope for those who call upon the name of the Lord. In the second section, Peter confronts the crowd with their knowledge of Jesus of Nazareth, whose signs and wonders they witnessed. He asserts that God's determined counsel and foreknowledge orchestrated these events, and quotes David to affirm that the grave could not hold the Holy One. Peter boldly declares that Jesus, whom they crucified, must be the Messiah, placing them first in line for God's wrath unless they choose differently. In the final section, Peter clarifies that David's tomb still holds his body, while Jesus' tomb is empty, fulfilling prophecy as the greater Son, the Messiah. He proclaims Jesus as King and Savior, seated at God's right hand, dispensing the Holy Spirit to empower the church. Peter highlights a period between Christ's ascension and the final subjugation of enemies, a time for choosing sides in the spiritual battle. He concludes by asserting that God made Jesus both Lord and Messiah, accusing the crowd of crucifying their Savior and urging them to decide whether to face Him as Judge or Redeemer. The sermon's impact was profound, striking guilt into the devout Jews who sought guidance. Peter instructs each to repent, be baptized, and acknowledge Jesus as Messiah, opening salvation to as many as God calls. He urges them to come out of the world and separate from a vile generation, aligning with the age of God that has just begun. The result was a mass conversion of about three thousand souls, uniting the early church in fervent prayer, brotherly love, and shared purpose, marking a high point of spiritual unity. Peter's message remains a call to choose daily between following Christ or returning to the world, facing judgment toward salvation or wrath.