"Undeserved grace" refers to receiving kindness, forgiveness, or blessings that we didn't earn or deserve. It signifies getting something good even though we didn't do anything to earn it. Full definition
What we call salvation or justification is given to man, the creature and sinner, only through the free and undeserved grace of God, that is through God's free self - revelation in Jesus, the crucified and the risen Christ. (religion-online.org)
There is no «we» who magnanimously admit «them»; there is a community of outcasts who together recognize their common need of undeserved grace. (religion-online.org)