But you, O Lord, are a God full of compassion, and gracious, longsuffering, and abundant in mercy and truth.
Read Chapter 86
Augustine of Hippo
AD 430
19. "And Thou, Lord God, art One who hast compassion and merciful, longsuffering, and very pitiful, and true" (ver. 15). Wherefore longsuffering and very pitiful, and One who hast compassion? Because hanging on the Cross He said: "Father, forgive them, for they know not what they do." Whom prayeth He to? for whom doth He pray? Who prayeth? Where prayeth He? The Son prays to the Father, crucified for the ungodly, in the midst of very insults, not of words but of death inflicted, hanging on the Cross; as if for this He had His hands stretched out, that thus He might pray for them, that His "prayer might be directed like incense in the sight of the Father, and the lifting up of His hands like an evening sacrifice."
True. This title is also applied to Christ, who, of course, is God:; since every man is liable to mistake, Romans iii. 4., and Apocalypse xix. 1. God authorized Moses and the prophets to address Him, as the psalmist does, Exodus xxxiv. 6., and Joel ii. 13. (Berthier)