he resurrection of Jesus Christ from the dead is the center of the Christian faith. Saint Paul says that if Christ is not raised from the dead, then our preaching and faith are in vain (I Cor. 15:14). Indeed, without the resurrection there would be no Christian preaching or faith. The disciples of Christ would have remained the broken and hopeless band which the Gospel of John describes as being in hiding behind locked doors for fear of the Jews. They went nowhere and preached nothing until they met the risen Christ, the doors being shut (John 20: 19). Then they touched the wounds of the nails and the spear; they ate and drank with Him. The resurrection became the basis of everything they said and did (Acts 2-4): “. . . for a spirit has not flesh and bones as you see that I have” (Luke 24:39).  The resurrection reveals Jesus of Nazareth as not only the expected Messiah of Israel, but as the King and Lord of a new Jerusalem: a new heaven and a new earth.

https://oca.org/saints/lives/2019/04/28/27-holy-pascha-the-resurrection-of-our-lord