John's picture of heaven in Revelation 7:9-10 gives a striking image: multitudes of people clothed in white, gathered before the throne and giving God their praise. These people come from every end of the earth--they are from all tribes, nations, and tongues, gathered as one and united in Christ. For them to know Christ, of course, someone had to bring them His saving message; as Christians, we are all called to be that someone, be it on our own street or on the other side of the globe. In today's chapel message, IMB President Paul Chitwood explores the full meaning of this calling, for how we all play a part in making the future vision of heaven happen.