This is a picture of Christ having returned to earth and this group of men are standing with Him ready to go alive into the kingdom. This means that the 144,000 have survived the 7 years of wars, famines, earthquakes, plagues, and millions of people dying from the judgments and the persecutions from Satan himself through the Antichrist and the false prophet. Not to mention that sin has been running rampant over the world without restraint and people being deceived into false religion by the false prophet to worship the Antichrist . So here they stand with Christ victorious and alive having the seal of protection from God, ready to walk right into the kingdom.