Isaiah and Brigham Young foresaw the Salt Lake Temple, many people gathering to and visiting the Salt Lake Valley, and the Saints prospering there.
Isaiah 2:2–3
2 And it shall come to pass in the last days, that the mountain of the Lord’s house shall be established in the top of the mountains, and shall be exalted above the hills; and all nations shall flow unto it.
3 And many people shall go and say, Come ye, and let us go up to the mountain of the Lord, to the house of the God of Jacob; and he will teach us of his ways, and we will walk in his paths: for out of Zion shall go forth the law, and the word of the Lord from Jerusalem.
President Brigham Young said:
“Here [the Salt Lake Valley] is the place God has appointed for His people. We have been kicked out of the frying pan into the fire, out of the fire into the middle of the floor, and here we are and here we will stay. God has shown me that this is the spot to locate His people, and here is where they will prosper; He will temper the elements for the good of His Saints; He will rebuke the frost and the sterility of the soil, and the land shall become fruitful. Brethren, go to, now, and plant out your fruit seeds. . . .
“For in these elements are not only all the cereals common to this latitude, but the apple, peach and plum; yea, and the more delicate fruits, the strawberry and raspberry; and we will raise the grape here . . . ; and as the Saints gather here and get strong enough to possess the land, God will temper the climate, and we shall build a city and a temple to the Most High God in this place. We will extend our settlements to the east and west, to the north and to the south, and we will build towns and cities by the hundreds, and thousands of the Saints will gather in from the nations of the earth. This will become the great highway of the nations. Kings and emperors and the noble and wise of the earth will visit us here . . . Take courage, brethren. . . .
“It is our duty first to develop the agricultural resources of this country, for there is no country on the earth that is more productive than this. We have the finest climate, the best water, and the purest air that can be found on the earth; there is no healthier climate anywhere. . . . [B]rethren, plow your land and sow wheat, plant your potatoes . . . It is our duty to preach the Gospel, gather Israel, pay our tithing, and build temples.”
(Quoted in James S. Brown, Life of a Pioneer [1900], 121–22.)