My righteousness is near; my salvation has gone forth, and my arms shall judge the people; the coastlands shall wait upon me, and on my arm shall they trust.
Read Chapter 51
Cyril of Alexandria
If we want to know the meaning of these words in the person of God and Father, then we say that he calls the Son “his righteousness.” For we are saved in him … through his great mercy.… He is called “righteousness” and “salvation” and rightly so. For he has removed all evil from us and, freeing us from the chains of death, has led us into eternal life.… Those who were once weak and prostrate on the ground grasp his right hand and gain the hope of an unexpected salvation. For the holy Scriptures often call the Son the right arm of the Father. For he is his power. - "Commentary on Isaiah 188.8.131.52"