As mentioned before, Jesus Christ has indeed overcome the world. As darkness has no power when light appears, so the world cannot overcome the Light of the World (see 3 Nephi 25:2) for all humankind. He will not forsake us.
As a mother hen covers her chicks with her wings, so the Redeemer will surround us with His comprehensive power if we will come to Him (see Matthew 23:37). There is room under those wings for all of us, for He declares:
"Wherefore, be of good cheer, and do not fear, for I the Lord am with you, and will stand by you; and ye shall bear record of me, even Jesus Christ, that I am the Son of the living God, that I was, that I am, and that I am to come" (D&C 68:6).
True, we live in a time of war, a day of conflicts and terrors not only among nations but within our own hearts. But He who is the Balm of Gilead (see Jeremiah 8:22) is the Lord of all creation; only in Him are peace and serenity found. Amid all our mortal gloom and doom, Jesus Christ has overcome the world. Come, let us rejoice.