Isaiah 18:3 All ye inhabitants of the world, and dwellers on the earth, see ye, when he lifteth up an ensign on the mountains; and when he bloweth a trumpet, hear ye.
This is not Isaiah’s most influential writing of what to expect, but, within one sentence he identifies who he is addressing and gives them advice about looking at signs, where to look, and advice to listen when trumpet-like warnings are issued. His forward-looking advice, lovingly given, encourages all of the earth’s inhabitants to see and hear the warnings that will send.
Isaiah also hints that the signs will be on the mountains. One possible meaning of the mountains as a location to see the signs is the prophets who have been served from Salt Lake City, in the mountains of North America. Because mountains have frequently been associated with temples, another possible source of the signs is within the temples of the Church of Jesus Christ of Latter-day Saints. The latter-day prophets have shared many messages since 1830, with many of those messages being given during general conference talks. The temples are physical signs that God is once again having His House set up for His children to find their way home. As more temples are constructed, the ensign of the temple comes closer to more inhabitants.
Most of the earth’s inhabitants are not aware of Isaiah’s encouragement. Many of them need instructions before they can become able to understand why heeding Isaiah is necessary. In verse 2, Isaiah mentions ambassadors who will travel swiftly to the scattered people who will be brought into Mount Zion.