There will be signs that these things (mentioned in the previous verses discussing Jesus' return) are about to happen. The sign of vultures in the sky alert the onlooker that something has died nearby. Well, what are these signs? Luke 17 reveals the signs Jesus has given: 1) Some will say he has already returned; 2) the Son of Man (Jesus) will have suffered terribly (i.e., gone to the cross); 3) people will be going about their daily lives. Well, if those are Jesus' signs, then it sounds like just about any ordinary time after Jesus has been crucified. Yes, I believe that is the point. We must be ready all the time at any time. From the day of Pentecost when the first people became Christians until today, we have been in the last days. Jesus stands close to the edge of time and when the Father says "Now!" Jesus will visibly and undeniably step back into our world and claim his disciples and take them home to his Father in heaven. Throughout this discussion, Jesus has repeatedly warned his disciples to always be ready. He says it again in this passage in a slightly different way, but with an equally clear message: "My coming is always near. Any time that looks like a normal day could be my time to come!"