The Beatitudes are the eight declarations of blessedness spoken by Jesus at the beginning of the Sermon on the Mount (Matthew 5:3-12), each beginning with "Blessed are..." It is debated as to exactly how many beatitudes there are. Some speak of seven, nine, or ten beatitudes, but the number appears to be eight (verses 10-12 of Matthew 5 being one beatitude).
The Greek word translated “blessed” means "spiritual well-being and prosperity." This refers to the deep joy of the soul. Those who experience the first aspect of a beatitude (poor, mourn, meek, hungry for righteousness, merciful, pure, peacemakers, and persecuted) will also experience the second aspect of the beatitude (kingdom of Heaven, comfort, inherit the earth, filled, mercy, see God, called sons of God, inherit the kingdom of Heaven). The blessed have a share in salvation and have entered the kingdom of God, experiencing a foretaste of heaven. Another possible rendering of each beatitude is an exclamation of: "O the bliss [or blessedness] of..."
The Beatitudes describe the ideal disciple and his rewards, both present and future. The person whom Jesus describes in this passage has a different quality of character and lifestyle than those still "outside the kingdom." As a literary form, the beatitude is also found often in the Old Testament, especially in the Psalms (1:1; 34:8; 65:4; 128:1) and in the New Testament as well (John 20:29; 14:22; James 1:12; Revelation 14:13).