Bernardo Estrada, «The Last Beatitude. Joy in Suffering.», Vol. 91 (2010) 187-209
The motive of joy in suffering for Jesus' sake, makes the last beatitude in Matt 5,11-12 and Luke 6,22-23 different from the former blessings. The persecution form present in this beatitude seems to be an authentic saying of Jesus, subsequently widespread in NT literature. Such a motive, in fact, does not appear in Judaism and in intertestamental or in apocryphal literature. The First Letter of Peter is instead a special witness of 'joy in suffering'.