When Jesus' followers gathered together, they comprised a group that was not very diverse. They all belonged to the same ethnic group, grew up in the same culture, and spoke the same langauge. That would change drastically on Pentecost, when the gospel would be proclaimed in many languages to people from "every nation under heaven" (Acts 1:5). This diversity has always been part of Christ's plan. Rather than eliminating differences among the Church's members, the Church's unity is built on truths that transcends those differences. The Church truly is a communion of saints. Differences in our world often lead to division. Therefore, when the world sees the unity in diversity that characterizes Christ's Church, it will recognize something unique and special about Christians.
Three days after Jesus’ death he rose victorious from the dead. The rest of eternity is now a victory march for the risen Christ. We are not just observers of Christ’s victory. We are more than fans cheering for our favorite athlete. Rather, we are active participants in Christ’s tirumph. The victory is ours, now and forever.