We may not know why difficulties come, but we trust there IS a reason and that it's for the highest good. To resist the hardships we encounter only brings more pain so we learn to witness & look for the lessons contained within them.
Not a single thing have I faced in life – no matter the level of hardship – that didn't turn out to be necessary and helpful towards expanding my understanding of Life & Source.
Life challenges are the things that grow us. They are our difficult friends.