"but the one who endures to the end, he will be saved"
This section of Matthew is talking about the middle point of the seven-year period preceding Christ's second coming, great distress will be experienced. The Antichrist will rise to power. Many people will be deceived by false prophets. This verse does not refer to a personal self-effort at endurance that results in salvation. It instead talks about physical deliverance.
Basically, if the people who follow Christ during the Tribulation can stand firm in their faith by trusting in the Lord, they will be taken up to heaven in their physcial bodies. They would have already been "saved". They will simply be deleivered from the pain and sorrow of the Tribulation. Remember, there is nothing you can do to "earn" or "win" salvation. It is complete trust and faith in Christ Jesus!
let me know what you think!