19, 20. (a) What did first-century Christians do when they saw Jerusalem surrounded by Roman armies? (b) What is represented today by “the mountains,” and what should prompt meekhearted ones today to flee there?

¹⁹ Luke’s gospel warned Christians of his day to flee when they saw “Jerusalem surrounded by encamped armies.” As already noted, those armies came in 66 C.E., and the opportunity to flee arose that same year when Cestius Gallus withdrew his troops. After the Christians fled, war continued between the Jews and the Romans​—although not around Jerusalem. Vespasian was sent by Emperor Nero to Palestine, and successful campaigns were conducted there in 67 and 68. Then Nero died, and Vespasian got involved in the Imperial succession. But after he was made emperor in 69 C.E., he sent his son Titus to finish the Judean war. In 70 C.E., Jerusalem was destroyed.

²⁰ Christians, though, did not wait in Jerusalem to see all of that. As soon as they first saw the besieging armies, they knew the city was in deadly danger.

In each case, “the disgusting thing” appeared at the moment Jehovah wanted his people to flee. In the first century, Christians had to remain for a time in Jerusalem in order to preach there. (Acts 1:8) Only in 66 C.E., when destruction was imminent, did a “disgusting thing” appear, warning them to flee. But to be “in” modern-day Jerusalem means to be part of the religious domain of Christendom.a It is impossible to serve Jehovah acceptably in such a corrupt and apostate environment. Hence, early in this world’s time of the end “the disgusting thing” appeared, warning Christians to flee. The flight out of Christendom is ongoing, each person having a warning to flee as soon as he discerns that “the disgusting thing” is in place.