The Temple in Jerusalem during Jesus’ life was an amazing structure. The Jews, Jesus’ disciples included, were very proud they had such an impressive house of worship. Jesus lets his disciples know that it will be completely destroyed. The prophecy is fulfilled in 70 AD when the Romans invade to put down a rebellion. Jesus also describes what things are going to be like when he returns. The natural disasters, persecution, conflict and false religious leaders could describe any generation since Jesus’ death, but just before Jesus’ return, the events will threaten all human life (verse 22).
Although we should do all we can to bring people to Christ and spread justice to all people, the ultimate solution is Christ’s return. Jesus tells us we should always be prepared for his return. We don’t want to be caught not doing what he would want us to do.