Anyone who has tasted of the sufferings of the wicked and then learns of the merciful Plan of Salvation, understands how important it is to preach the gospel. How important is it that those doomed to suffer are warned of what is to come? How important is it that they learn of their Savior who has already paid the price with his infinite atonement? These thoughts are echoed in the words of the sons of Mosiah:
Now they were desirous that salvation should be declared to every creature, for they could not bear that any human soul should perish; yea, even the very thoughts that any soul should endure endless torment did cause them to quake and tremble. (Mosiah 28:3)