The second beatitude is mourning, not necessarily the mourning as we think of it involving death, but mourning at the wickedness of the world.
Blessed are they that mourn: for they shall be comforted.–Matthew 5:4
To “mourn” is to grieve over our own weakness in relation to God’s standard of righteousness and His Kingdom. It is also to mourn over the things that grieve God, to have our feelings in sympathy with the feelings of God, and to be afflicted in our spirits over the sin, immorality and cruelty manifested in the world. Those who mourn are comforted by receiving from the Father “righteousness, and peace, and joy in the Holy Ghost.”
In Luke 16:20, it says, “Verily, verily, I say unto you, That ye shall weep and lament, but the world shall rejoice: and ye shall be sorrowful, but your sorrow shall be turned into joy.” We see this in the world today. There are so many things we see in the news that is contrary to our faith, contrary to what the Bible says. The world rejoices these things as advancement in our culture. We should be mourning how wicked our world has come and how far our society has been removed from God.
As Christians we should be deeply disturbed by how far our world has got from God’s instruction. We should be grieving, we should be bothered, we should be sick of it. We have become so accustomed to the way of the world that some of it we take as normal and okay. We should never feel like we belong in this world.
And God shall wipe away all tears from their eyes; and there shall be no more death, neither sorrow nor crying, neither shall there be any more pain for the former things are passed away.–Revelation 21:4
What should bring us joy, is knowing that the Lord is coming back. That all the pain and suffering will one day end.