In Romans chapter 8 we come to a great verse on life and peace. After Paul in Romans spends many chapters on God’s condemnation of sinful man, and the justification only available through what God did in Jesus, we now come to chapter eight, a chapter about living in the Spirit. No matter what man could do to rescue himself, only God’s work could do this. Man with his great desire to please God, just cannot satisfy God’s requirement. Only the work that Jesus did on the cross could satisfy what God requires.
So in Romans chapter eight we come to: Romans 8:6 For the mind set on the flesh is death; but the mind set on the Spirit is life and peace. This means to walk in the Spirit by following the Lord brings peace in our life. So peace comes by walking with the Lord.