You had mentioned in your post above, "Jesus said those who will endure in the faith of Christ unto the end the same shall be saved."
Endures what?
End of what?
Saved from what?
The Disciples who sat with Jesus on the Mt. of Olives in Matthew 24:3 asked Him three questions, when shall these things be, what shall be the sign of thy coming, and of the end of the world? These three questions are now revealed to us as the Spirit of God has revealed them to John who told him to write these revelation visions down and give them to the Church for instruction and understanding. Matthew 24 is an outline of all things that will come to pass that is revealed in full in Revelations before that of Christ return for His Bride. This events are called the great and terrible day of the Lord.
There was a question asked in Revelation 6:17 about the great day of His wrath is come and who shall be able to stand? Part of this question is answered in Nahum Chapter One for one example as there are many scriptures detailing Gods great vengeance against His enemies and His mercy on those who are called by His name having the seal of God on them, Ephesians 4:30. Matthew 24 gives us an outline and Revelations gives us the meaning of the outline.
The spirit of Jezebel runs rampant throughout the land spreading lies from the pulpit that seem pleasing to the ears as many would rather believe their Pastor instead of searching and Spiritually discern what they are being taught, Matthew 7: 21-23, John 3-3-7; Acts 19:1-6; Romans 10:9, 10; 1 John 4:1-6.
The first four seals are the beginning of sorrows described in Matthew 24:4-26 before that of Christ return. There are three woes to come after the beginning of sorrows. The first woe is found in Rev Chapter 8-9 with the first six trumpets. The second woe is that of the two witnesses in Rev Chapter 11:1-14 as the preaching of Gods word has come to an end as the time of the Gentiles has been fulfilled in the last person repenting and turning back to God. The third woe begins with the seventh trumpet in Rev 11:15 and it comes quickly.
By studying all the scriptures below in Revelations I come to the conclusion we will see much tribulation, but not to fear what must come, but stand strong in the Holy Place, which is the faith of Christ Jesus so we can endure until the coming of the Lord and be His witnesses as a faithful servant.
Act 14:22 Confirming the souls of the disciples, and exhorting them to continue in the faith, and that we must through much tribulation enter into the kingdom of God
Mat 24:13 But he that shall endure unto the end, the same shall be saved.
Rev 3:5; 19:8 Jesus is showing us to look for the signs of his coming
Rev 5:13; 6:16,17 On earth and under the earth are those who are still here until the end of days
Rev 6:9-11 Note where John says fellow servants and brethren that should be killed as they were and we are in the midst of the seven seals right now heading towards the seven trumpets
Rev 7:13-17 Which came out of great tribulation; fulfillment of the gentiles
Rev 8:13 Three woes are war, earthquakes, and meteors
Rev 13:11-18 Here John is showing us about Papal Rome ruling the world again as a one world government. 666 represents action of the hands and thoughts of the mind
Rev 14:14-20 The harvest of Gods Children
Rev 16:11,15 And they repented not. We can only repent through Gods Spirit and if that Spirit dwells in the hearts of the believers then who would be left for anyone to repent if they wanted to if we were already gone
Rev 18:23, 24 We have now come out of great tribulation of Papal Rome’s rule (not Catholics). This is Gods rapture of his bride or as scripture calls it being caught up to meet Jesus in the air
Rev 19:7,8 We have made ourselves ready by enduring great tribulations, even to death; we had to go through before the end of days
Rev 20:4-6 These verses show that we went through much annihilation and endured until Jesus came back in the clouds for us
Rev 20:12-15 The Great White Throne judgment and Jesus judgment for the works we did or did not do for him here on earth