Blessed are those who mourn, for they will be comforted.
Christ does not say mourners escape unhappiness; He says their very mourning prepares them to receive eternal joy by driving them to seek true comfort in God alone, not in the world's false props. That grief itself becomes a doorway to happiness.
AI summary
Christ begins his sermon with blessings, for he came into the world to bless us (Act 3:26), as the great High Priest of our profession; as the blessed Melchizedec; as He in whom all the families of the earth should be blessed, Gen 12:3.
Commenting on Matthew 5:3-12
They mourn for indwelling sin, for unbelief, for the profaneness rampant in the world, for the declensions of professors whose lives dishonor Christ. These are blessed because God, Christ the Comforter, and the Spirit Himself will comfort them through the Gospel and its promises.
AI summary