God’s ultimate plan before Creation included a radical change at the Cross. To enact this dramatic change, God performed two important acts on the Day of Pentecost. First, the heavenly Father sent the Holy Spirit to place believers in Christ (1 Cor. 12:13; Eph. 1:4). Second, the Father had placed all sinners in Christ at the Cross (Rom. 6:6; Gal. 2:20); when Christ died, all sinners died to their old life and could now be saved by simply believing on the Lord Jesus Christ. At the Day of Pentecost, this new gospel began. It was the in-Christ phenomenon—believers in Christ and Christ in believers.