"When a train goes through a tunnel and it gets dark, you don't throw away the ticket and jump off. You sit still and trust the engineer." - Corrie Ten Boom
“Whenever we are inclined to feel burdened down with the blows of life’s fight, let us remember that others have passed the same way, have endured, and then have overcome.” —Thomas S. Monson, “Meeting Life’s Challenges,” Ensign, Nov. 1993, 68
Here is a great talk on the purpose and process of death (by Elder McConkie): https://www.lds.org/general-conference/1976/10/the-dead-who-die-in-the-lord?lang=eng
"As with any other germ, a little preventive medicine ought to be practiced in terms of those things that get us down. There is a line from Dante that says, 'The arrow seen before cometh less rudely' (Divine Comedy). President John F. Kennedy put the same thought into one of his state of the union messages this way: 'The time to repair the roof is when the sun is shining.' Jeffrey R. Holland For Times of Trouble, BYU Devotional, March 1980
"Lay not up for yourselves treasures upon earth, where moth and rust doth corrupt, and thieves break through and steal; But lay up for yourselves treasures in heaven, where neither moth nor rust doth corrupt and where thieves do not break through and steal. For where your treasure is, there will your heart be also." 3 Nephi 13: 19-21