Christian churches nowadays say and believe that merit and justice belong to the Lord alone because of the obedience he gave in this world to God the Father and especially because of his suffering on the cross. They suppose, however, that the Lord’s suffering on the cross was the act of redemption itself. That was not in fact an act of redemption; it was an act of glorification of his human nature (see the discussion of redemption under the next subheading [Sections 114–137]). The acts of redemption through which the Lord made himself justice were these: carrying out the Last Judgment, which he did in the spiritual world; separating the evil from the good and the goats from the sheep; driving out of heaven those who had joined the beasts that served the dragon [Revelation 13]; assembling a new heaven of the deserving and a new hell of the undeserving; bringing both heaven and hell back into the divine design; and establishing a new church. These acts were the acts of redemption through which the Lord became justice. Justice is following the divine design in all that one does, and bringing back into the divine design things that have fallen away from that design. Justice is the divine design itself.
These acts are meant by the following words of the Lord: “It is fitting for me to fulfill all the justice of God” (Matthew 3:15); also by these words in the Old Testament:
Behold, the days are coming when I will raise up for David a righteous offshoot who will reign as king and execute justice on earth. And this is his name: Jehovah is our Justice. (Jeremiah 23:5–6; 33:15–16)
I speak with justice; I am great in order to save. (Isaiah 63:1)
He will sit on the throne of David to establish it with judgment and justice. (Isaiah 9:7)
Zion will be redeemed with justice. (Isaiah 1:27)
from True Christianity, Section 95