The Four Daughters of God are a personification of the virtues of Truth, Righteousness/Justice, Mercy, and Peace in medieval Catholic religious writing.
The most important contributors to the development and circulation of the motif were the twelfth-century monks Hugh of St Victor and Bernard of Clairvaux, followed by the Meditations on the Life of Christ, which Bernard's text inspired.
The motif is rooted in Psalm 85:10, 'Mercy and Truth are met together; righteousness and peace have kissed each other'. The use in Christian thought seems to have been inspired an eleventh-century Jewish Midrash, in which Truth, Justice, Mercy and Peace were the four standards of the Throne of God.
The motif changed and developed in later medieval literature, but the usual form was a debate between the daughters (sometimes in the presence of God)
about the wisdom of creating humanity and about the propriety of strict justice or mercy for the fallen human race. Justice and Truth appear for the prosecution, representing the old Law, while Mercy speaks for the defense, and Peace presides over their reconciliation when Mercy prevails.
However, some versions, notably Robert Grosseteste's Chasteu d'amour, the Cursor Mundi, the English Gesta Romanorum, and The Court of Sapience
develop it along the lines of a medieval romance. They place the story in a feudal setting and give to a great king four daughters, a son, and a faithless servant. Because of a misdemeanor the servant has been thrown into prison. The daughters beg for his release. The son offers to take upon himself the clothing of the servant and to suffer in his stead. Except for the element of the dispute and the method of reconciliation, the two main traditions in the development of the allegory are vastly different.
The motif fell out of fashion in the seventeenth century. It may nonetheless have influenced the work of William Blake.