Will there be prophetic signs before Jesus returns at the Second Coming?
Yes. The Second Coming, when Christ returns to the Mount of Olives, will have prophetic events leading up to it, so there will be no doubt as to when He will come to the Mount of Olives. By contrast, another event has no prophetic sign and nothing to indicate its day or year.
Les explains that the Second Coming is the event when Christ actually returns to the Mount of Olives, and it will have prophetic events leading up to it, so there will be no doubt as to when He will be coming there. The other event, by contrast, has no prophetic sign and nothing to indicate the day or year it can be expected. He then connects this to verse 52, where it takes place in a moment, in the twinkling of an eye, at the last trump; the trumpet shall sound, the dead shall be raised incorruptible, and believers will be changed from corruption to incorruption, from mortal to immortal.