Jesus is the Light and Life of the World. Elder Bednar recently gave a talk on this very subject: https://www.lds.org/broadcasts/article/christmas-devotional/2015/12/the-light-and-the-life-of-the-world?lang=eng
"At what point then is the approach of danger to be expected? I answer, if it ever reach us, it must spring up amongst us. It cannot come from abroad. If destruction be our lot, we must ourselves be its author and finisher. As a nation of freemen, we must live through all time, or die by suicide." --January 27, 1838
"...there is nothing noble or impressive about being cynical. Skepticism is easy--anyone can do it. It is the faithful life that requires moral strength, dedication, and courage. Those who hold fast to faith are far more impressive than those who give in to doubt when mysterious questions or concerns arise." President Dieter F. Uchtdorf, October 2015 General Conference