Gathering

I am curious about the gathering of the saints which will take place during the very terrible times at the end of the world. I read this quote in the Doctrine and Covenants Student Manual, Religion 324 and 325, p. 60.

"Elder Harold B. Lee explained....
...The Lord has placed the responsibility for directing the work of gathering in the hands of the leaders of the Church to whom he will reveal his will where and when such gatherings would take place in the future. It would be well---before the frightening events concerning the fulfillment of all God's promises and predictions are upon us, that the Saints in every land prepare themselves and look forward to the instruction that shall come to them from the First Presidency of this Church as to where they shall be gathered and not be disturbed in their feelings until such instruction is given to them as it is revealed by the Lord to the proper authority."
(In Conference Report, April 1948, p. 55)