John sees a vision of a great multitude of people from every nation, language, tribe and people, dressed in white and praising God and the Lamb. He learns that they are those who have been sealed by God and patiently endured great tribulation through their faithfulness to the Lamb. The promise of God’s presence and comfort is for all Christians, including us today, who have been sealed by God and who have been made righteous by the blood of the Lamb.