His first coming—His mortal life—was witnessed by relatively few people. When He returns “with power and great glory,” all humankind will witness it (D&C 29:11). The Second Coming will usher in the Millennium, when the Savior will “dwell in righteousness with men on earth a thousand years” (D&C 29:11).
The scriptures describe many events that will occur before the Second Coming. Some of them include:
The gospel being preached across the world (see Matthew 24:14).
Although we can see signs that His Second Coming is near, no one knows exactly when the Lord will return: “The hour and the day no man knoweth, neither the angels in heaven, nor shall they know until he comes” (D&C 49:7).
Some will not be prepared for the Savior’s return. It will be a fearful time for the wicked but a time of peace and triumph for the righteous. Thus, the scriptures and latter-day prophets have taught us to live so we will be prepared to meet our Savior whenever He comes again. The Lord taught:
“At that day, when I shall come in my glory, shall the parable be fulfilled which I spake concerning the ten virgins.
“For they that are wise and have received the truth, and have taken the Holy Spirit for their guide, and have not been deceived—verily I say unto you, they shall not be hewn down and cast into the fire, but shall abide the day” (D&C 45:56–57; see also Matthew 25:1–13).
Before the Second Coming, there will be earthquakes, tempests, and thunder and lightning storms, and the waves of the sea will heave themselves “beyond their bounds” (see D&C 88:89–90).
“The sun shall be turned into darkness, and the moon into blood, before the great and the terrible day of the Lord come” (Joel 2:31).
The Savior will return in glory: “So great shall be the glory of his presence that the sun shall hide his face in shame” (D&C 133:49).
The Savior will stand on the Mount of Olives, and the Jews will ask, “What are these wounds in thine hands and in thy feet?” He will answer, “These wounds are the wounds with which I was wounded in the house of my friends. … I am Jesus that was crucified.” (See D&C 45:48–52.)
The righteous will be resurrected and caught up to meet the Savior in the clouds (see D&C 88:95–97).
“We testify that [Jesus Christ] will someday return to earth. ‘And the glory of the Lord shall be revealed, and all flesh shall see it together’ (Isaiah 40:5). He will rule as King of Kings and reign as Lord of Lords, and every knee shall bend and every tongue shall speak in worship before Him. Each of us will stand to be judged of Him according to our works and the desires of our hearts.”
“The Living Christ: The Testimony of the Apostles,” Ensign or Liahona, Apr. 2000, 3.