The word states that the generation that sees the beginnings of the end times will not surely pass away, OK? Well, here’s another idea. What if instead of using the average idea of 70 years being the time frame, we take literally the passing away of the generation. Now if as we know, some people live to be 100 years or even more, would God consider that the generation had not passed away even if one person was left alive and kicking at say 102 or 105 years of age?.
Amos 3:7 says, “Surely the Sovereign Lord does nothing without revealing His plan through His servants, the prophets.” This tells us that God will not leave us guessing. If there’s a part of His plan we don’t understand we can look in the Bible for the answer. In two different places He gave us 70 years as the average life expectancy, Psalm 90:10 and Isaiah 23:15.
Remember, He was giving us signs so we’ll know when the end is coming. How would anyone know when the last person of a generation has died? A sign does no good unless we can use it to give us direction.