The church is fundamentally the resurrection community—a people formed around faith in the risen Lord Jesus Christ. The church did not suddenly appear at Pentecost, nor did it fully exist from the Garden of Eden. Instead, the church developed progressively through three stages: roots in Israel, embryo in Christ's earthly ministry, and birth through the resurrection and Pentecost. The church's roots go back to God's covenant with Abraham, the nation of Israel, and the promises of the Messiah found in the Mosaic and Davidic covenants. These Old Testament foundations prepared the way for Christ and the formation of His people. During Jesus' earthly ministry, the church existed in embryo as He called the twelve apostles and gathered disciples around Himself, teaching them about the kingdom of God and laying the foundation for the future church. The birth of the church occurred when Jesus rose from the dead and appeared to His disciples. The resurrection transformed fearful followers into bold witnesses and confirmed that Jesus is Lord. During the 40 days after His resurrection, Jesus taught His disciples, commissioned them, and prepared them for their mission. Pentecost then marked the public, Spirit-empowered launch of the church as believers were empowered by the Holy Spirit to proclaim the gospel to all nations. The church is therefore the body of Christ, composed of both Jews and Gentiles united in faith. Jesus is its head, the apostles and prophets form its foundation, and believers are being built together as God's dwelling place through the Spirit. The church exists visibly in local assemblies where believers gather for worship, teaching, fellowship.