In the Book of Mormon we read that Alma and Amulek were brought to the place of martyrdom and forced to witness the killing of the believers. Amulek was so pained by what he saw that he wanted Alma to exercise the power of God to save the people from the flames. But Alma said the spirit constrained him from doing so, saying that the Lord was receiving the people up unto Himself, in glory. The blood of the innocents would stand as a witness against their killers at the last day. Amulek was afraid that they would be burned also, but Alma said that their work was not finished so they would not be burned. Alma 14:9-13 "And it came to pass that they took Alma and Amulek, and carried them forth to the place of martyrdom, that they might witness the destruction of those who were consumed by fire. And when Amulek saw the pains of the women and children who were consuming in the fire, he also was pained; and he said unto Alma: How can we witness this awful scene? Therefore let us stretch forth our hands, and exercise the power of God which is in us, and save them from the flames. But Alma said unto him: The Spirit constraineth me that I must not stretch forth mine hand; for behold the Lord receiveth them up unto himself, in glory; and he doth suffer that they may do this thing, or that the people may do this thing unto them, according to the hardness of their hearts, that the judgments which he shall exercise upon them in his wrath may be just; and the blood of the innocent shall stand as a witness against them, yea, and cry mightily against them at the last day. Now Amulek said unto Alma: Behold, perhaps they will burn us also. And Alma said: Be it according to the will of the Lord. But, behold, our work is not finished; therefore they burn us not."
In the Old Testament we read that the Lord will gather the house of Israel and they will dwell safely. They will know that He is the Lord their God. Ezekiel 28:25-26 "Thus saith the Lord God; When I shall have gathered the house of Israel from the people among whom they are scattered, and shall be sanctified in them in the sight of the heathen, then shall they dwell in their land that I have given to my servant Jacob. And they shall dwell safely therein, and shall build houses, and plant vineyards; yea, they shall dwell with confidence, when I have executed judgments upon all those that despise them round about them; and they shall know that I am the Lord their God."
Some verses with a thought booklet tell us that even is everything seems to go wrong that could go wrong, we can still rejoice in the Lord! He is our strength and will help us to get through whatever trials we're facing. We can trust in Him. Habakkuk 3:17-19 "Although the fig tree shall not blossom, neither shall fruit be in the vines; the labour of the olive shall fail, and the fields shall yield no meat; the flock shall be cut off from the fold, and there shall be no herd in the stalls: Yet I will rejoice in the Lord, I will joy in the God of my salvation. The Lord God is my strength, and he will make my feet like hinds' feet, and he will make me to walk upon mine high places. To the chief singer on my stringed instruments."