Blessed are those who mourn, for they will be comforted (Matthew 5:4)
The Greek word for blessed (i.e., makarios) used here has a meaning of being fortunate, prosperous or successful. That is, successful are those that mourn! Why? When do we mourn? Mourning is the proper reaction to the loss of something considered precious and dear... something or someone that we loved. This may the loss of a loved one, loss of plans for marriage due to unrequited love, loss of plans for your children's future as they become rebellious, or loss of career opportunities while being sidetracked in your place of employment for decades thus effectively wasting your working life, etc. Furthermore, mourning is part of the natural progression as we move through the stages of grief.