Blessed are those who mourn for they will be comforted.
Mourning points to pain, grief, something missing.
Again it infers that we know something isn't right, that everything is not OK.
The result of this mourning is comfort—the hole will be filled.
Not recognizing or caring about the void means that it will still be there, though it may not be noticed or identified.
So don't feel sad because you notice things need improving--sadness is the first step towards a brighter day.
5 hours ago