Blessed are those who are persecuted because of righteousness, for theirs is the kingdom of heaven. Blessed are you when people insult you, persecute you and falsely say all kinds of evil against you because of me. Rejoice and be glad, because great is your reward in heaven, for in the same way they persecuted the prophets who were before you.
Blessed are those who mourn, for they will be comforted.
Some bible scholars identity Isaiah 61 1:7 as the passage Jesus had in mind in the beatitudes. That old testament passage has ‘ He has sent me to bind up the brokenhearted… to comfort all who mourn…’
At the time of Isaiah the Jewish people were in exile in Babylon and mourning. Psalm 137:1 says By the rivers of Babylon we sat and wept
when we remembered Zion.
By the time of Jesus they were back in Palestine but ruled over by the Romans and awaiting their Messiah. Some thought the Messiah would be a King to make the Jewish people great.
We all have times of mourning when we loose somebody. We may also mourn over events in the world where people suffer through no fault of their own. We are called to be like Jesus and bring comfort to those who mourn.