While the Epistle speaks some of what was as opposed to what is now, the Gospel gives us a prophecy by Jesus of what to expect and what to do. And he also promises that that generation of people alive at that time would not pass away before it came to be! So, what gives?
In some other places in the gospels and elsewhere, there are clues to solve that riddle. Those who wish to sit and wait for something that is “coming”, nobody will stop them. But what about the rest of us?