It is for people whom we care nothing about that we demand happiness on any terms: with our friends, our lovers, our children, we are exacting and would rather see them suffer much than be happy in contemptible and estranging modes.

Lorin K. Hansen argues, "It is not Jesus' suffering per se that redeems men and women. Suffering has an effect on him, and it is that effect (or change) that makes possible human redemption. The power of redemption comes through his expanded knowledge and sensitivity, which he then expresses through his role as mediator."
... Elder Maxwell similarly explains that "the infinite intensiveness of Christ's suffering" was necessary for him to become a "fully comprehending Atoner."

It may be that this mortal existence is the only flash of eternity where we are allowed to have a veil over our minds and are allowed to experience incompleteness, pain, and sorrow, which give us such richness of experience. From this view, then, perhaps feeling lonely would not be seen as a disease condition but rather as one of the very purposes for being alive.
Pain, sorrow, suffering, and evil, then, may not be deficits to be overcome, controlled, removed, or eradicated, but rather they may be gifts from a benevolent Father that can serve as instruments for developing a divine nature. We may perhaps go so far as to see the traditionally tragic elements of life as the very tools of the trade in the construction of heavenly mansions.

It would not be unreasonable for a Christian to argue that since even Christ suffered on the cross, with suffering incomparable to any of our own, we have no right to ask why we suffer. To do so is impertinent, perhaps impertinent to the point of blasphemy. To complain about my suffering when faced with the suffering of Jesus Christ is, implicitly, to deny the gravity and effect of his suffering. I have no right to ask why I suffer. Here is another way to put the same point: if Jesus Christ asked the question of God’s justice while on the cross—“O God, why hast thou forsaken me?”—we have no right to think that we can avoid the same question. And if he did not receive an answer while in mortality, we have no reason to think that we can.