Bible Verses About Spiritual Peace: Is through the atonement of Christ

But he was pierced for our transgressions. He was crushed for our iniquities. The punishment that brought our peace was on him; and by his wounds we are healed.

For he is our peace, who made both one, and broke down the middle wall of partition,

having abolished in the flesh the hostility, the law of commandments contained in ordinances, that he might create in himself one new man of the two, making peace;

and through him to reconcile all things to himself, by him, whether things on the earth, or things in the heavens, having made peace through the blood of his cross.