I have seen that as a counselor to two living prophets of God. They are individuals with unique personalities. Yet they seem to share a consistent optimism. When someone raises an alarm about something in the Church, their most frequent response is “Oh, things will work out.” They generally know more about the problem than the people sounding the alarm. - Henry B. Eyring, “A Priceless Heritage of Hope”
Believers in the good news of the Gospel are inherently optimistic. I’ve never been able to see a way around this; even as men like Moroni or Ether were witnessing the utter extermination of nations and populations, there was something running deeper within them. It is more important than life itself, and immortally outlives it. It is the knowledge-based hope inherent to God’s gospel.