Many call The Day of Pentecost the birthday of the Christian Church. In returning to His Father by way of the cross and resurrection, Christ Jesus sends “the Helper” to His Church. The Lord pours out His Spirit on the apostles, that by their preaching, the Spirit should be given to His entire Church. As the multitudes are gathered from all nations, by the preaching of the mighty works of God in Christ Jesus, so does God the Father pour out the Spirit of His Son on all flesh.