Amen, daily bread. Thank you for the good word.
Suffering is a big issue for many people, I know for sure it is a reason some people are atheists. They just cant understand how a loving God can permit it.
There are Christians who have lost their faith because they met a cross they felt was too heavy for them to carry and thought it meant either that God wasn't real or that they themselves were not worthy. It really is very difficult. But another thing, it is even more difficult to face suffering alone without the assurance of a loving God. Lots of depressions and suicides are made of such.
Yes, it's hard to understand when we are in the thick of things, much less to rejoice!
This is a work of grace. It is beyond human ability to rejoice in suffering. But with God all things are possible. And this world is not everything. That's the bottom line for any Christian believer. Hope.