2 Nephi 6:14

And behold, according to the words of the prophet, the Messiah will set himself again the second time, to recover them; wherefore, he will manifest himself unto them in power and great glory, unto the destruction of their enemies, when that day cometh when they shall believe in him; and none will he destroy that believeth in him.

The prophet said the Messiah will come a second time to bring them back. So he will show himself to them with power and great glory. He will destroy their enemies on the day they believe in him. He won’t destroy anyone who believes in him.

According to the prophet, the Messiah will act a second time to bring them back. He’ll appear to them in power and overwhelming glory, destroying their enemies. This will happen when they finally believe in him—and he won’t destroy anyone who believes.