In the New Testament, the Greek word for “peace” is eirene, and it means rest and tranquility. The advent of our Lord Jesus brought peace as announced by the angels. Our Lord is called Prince of Peace. It is through His atoning work of justification that we can have peace with God. Peace is the fruit of the Spirit God and to set our minds on the Spirit will bring us life and peace. Rom 8:16. And that peace of God will keep our hearts and minds in Christ Jesus. Phil 4:7.
I have said these things to you, that in me you may have peace. In the world you will have tribulation. But take heart, I have overcome the world.
True peace can only be found in abiding in Christ.