 What a gathering, which being from every tribe and nation, means there is no barrier to any of us due to our heritage or inheritance. This gathering depends on one key. John asked who these in heaven were. The joyful answer was this. These are the ones coming out of the great tribulation. They have washed their robes and made them white in the blood of the Lamb. Our pasts have been washed away by His sacrificial blood. That cleansing has come entirely by His actions of grace.