The Tribulation is described as: "the wrath" (1Th. 5:9; Rev. 11:18); "the wrath to come" (1 Th. 1:10); "the great day of their wrath" (Rev. 6:17); "the wrath of God" (Rev. 14:10, 19; 15:1, 7; 16:1)! Born again believers will not be here during the Tribulation. God has declared it saying: "And to wait for His Son from heaven, Whom He raised from the dead, even Jesus, Who delivered us from the wrath to come" (1 Th. 1:10). Again His Word says, "For God hath not appointed us to wrath, but to obtain salvation by our Lord Jesus Christ" (1 Th. 5:9). He promised the faithful will not be here in Revelation 3:10 which says, "Because thou hast kept the Word of My patience, I also will keep thee from the hour of temptation, which shall come upon all the world, to try them that dwell upon the earth."
The removal of the Church prior to the Tribulation, is found in John 14:1-3; 1 Corinthians 15:50-54; and 1 Thessalonians 4:16-17. And because there is no mention of the Church during the Tribulation chapters of Revelation (6-18), it has been suggested that Revelation 4:1 is a picture of the Rapture of the Church; it says: "After this I looked, and, behold, a door was opened in heaven: and the first voice which I heard was as it were of a trumpet talking with me; which said, Come up hither, and I will shew thee things which must be hereafter."
All who call upon the Lord Jesus Christ, will be saved!