"Heal me Lord, for my bones are in agony" Psalm 6:2
Sometimes sadness can make us physically ache all over - and it's an ache that only God can deal with. Tears come uninvited and unexplained because life is painful.
But we are not without hope.
In the same way that the writer of this Psalm moves from being "worn out with sobbing" to being sure and certain that "God will answer my prayer", so we can be sure that although life is sometimes very, very sad - our beds are awash with tears and we are worn out - we are never without hope.
We are never without hope because God will answer our prayers.