Why would Christians believe that the 144,000 will be an actual, limited group of human beings? First, is because the 'ascending angel from the east' [Revelation 7:2] who apparently held a higher authority than the 'four angels who stood on the corners of the earth' said in effect, do not destroy the earth, sea, trees, or the 144,000 human beings until their mission is completed during the Great Tribulation. These designated 'servants of God' duly noted in Revelation 7:3 will be the witnesses and/or preachers will be preaching the Gospel of the Kingdom to a lost world during some of the judgments from the Lord in the above mentioned era of His history of humankind. Only after their mission is completed does God bring His Great Tribulation punishment on the lost world. The God who denied the angels the authority to destroy the earth, sea, trees, and sealed servants of Revelation 7:2, later in 8:7-9, through the first Trumpet Judgment and the second Trumpet blast, will destroy the earth with 'fire mingled with blood,' one 'third of the trees will be burned up, along with all the grass on the earth.' In verse eight--'one third of the seas/oceans will become bloody.' The number-144,000, the angels, the forbidding of the destroying of Christ's servants, the referencing of the twelve tribes of Israel and the seal and care of God on their lives is more than enough proof that He is speaking of real live people and future events. The result of these future saved evangelists or witness will yield up the 'great multitude' [Revelation 7:9]of Tribulation saints via their martyrdom. [7:14] Those serving the Lord before His throne in His Temple in verse 15 are also referred to in Revelation 20:4 who will be martyred in the future during this real, live Great Tribulation period of time. The mark in their foreheads or on their hands will be the number of the man, 666 as duly noted in Revelation 13:17-18. These martyred saints will not need the sun to light their day [7:16] because Jesus will be the Millennial King Who indeed is the Light of the world. They will reign with Christ, not one year, thirty years, one hundred and fifty years, but as God imparts to us, 1,000 years of time or the Latin meaning, a Millennium. [Revelation 20:2,3,4,5,6,7] Apparently, the remembrance of the antichrist, his persecution and killing of these saints will be expunged from their minds and hearts as they move into the Millennial Age. Why do I say that? Because of Revelation 7:17. Revelation 7:16 indicates that in this theocratic reign of Christ on the earth, people will eat food even as they did during the church age. Revelation 22:2 speaks of 'twelve manner of fruit,' plus Zechariah 14:21 indicates that the people will be able to eat the meat of the sacrificial animals during this Kingdom Age. Study the word, 'seethe therein.' Ezekiel 45:18, 23 and in other places in this book indicate that the people will offer memorial sacrifices, and afterward they will not waste the meat but will partake of it. The 144,000 and the 1,000 years etched into Biblical writ is not some kind of fanciful symobolism to be interpreted by each student of the Bible in a different way. Neither is it a quasi-spiritual interpretation that emaciates the true meaning of Scripture.