One of the Keys to Recognizing Warnings is That They are Repeated

Elder Henry B. Eyring gave a talk in General Conference in October 1998 ("A Voice of Warning", Nov. 1998 Ensign), and it was published once more in its entirety as the First Presidency message 11 years later in the Jan. 2009 Ensign ("Let us Raise a Voice of Warning").

"Because the Lord is kind, He calls servants to warn people of danger.  That call to warn is made harder and more important by the fact that the warnings of most worth are about dangers that people don't yet think are real...Here is the charge given to each of the members of The Church of Jesus Christ of Latter-day Saints:  "Behold, I sent you out to testify and warn the people, and it becometh every man who hath been warned to warn his neighbor...It's easy to say, "The time isn't right."  But there is danger in procrastination.

Here is another talk Elder Eyring gave at Conference, which was reprinted again.

In April Conference 1997, Elder Eyring said, "One of the keys to recognizing those warnings is that they are repeated....One of the ways we may know that the warning is from the Lord is that the law of witnesses...has been invoked.  When the words of the prophets seem repetitive, that should rivet our attention and fill our hearts with gratitude to live in such a blessed time."

("Finding Safety in Counsel")

Eleven years later, that same talk was used as the First Presidency message in the June 2008 Ensign. ("Safety in Counsel")  AGAIN, same exact talk:  "One of the keys to recognizing those warnings is that they are repeated...."