Blessed are they that mourn: for they shall be comforted.
For many years I wondered what this verse meant. I used to think that God wants us to feel bad for all the sin in the world and walk around depressed or sad all day. But now I believe this verse has to do with the need for us to fully face and deal with those things that hurt us. Only those who fully enter into this process of grieving over wrongs done to them, or for sin, will ever be able to process their pain to the point where they can be comforted by God.