Brother McNiel turns to Romans 5 where we find the explanation that sin entered into the world by one man, which passed to all men. But he reads on that the free gift of grace, our eternal salvation, also came by one man, Jesus Christ. By understanding what Christ has done for us, and walking in discipleship, brings us great blessing. He explains that this is acting as ambassadors for Christ in a world that is not our home. He warns us not to sacrifice this on the alter of convenience. Rather when called upon we should stand fast in the embassy (the church) and carry out our most important duty in this life.