“Grace be to you and peace from God the Father, and from our Lord Jesus Christ” Gal 1:3 (KJV)
The peace that comes about as a result of the grace of God worked out in Christ’s propitiatory sacrifice and resurrection and our calling unto Him is the peace of reconciliation (Rom 5:10, 2 Cor 5:18, Eph 2:16).
The Greek word translated ‘peace’ in our verse above is the secular Greek word εἰρήνη. The word (as is the concept in the NT) is a Hebraism when used in Christian and Hebrew literature, according to LSJ. In the LXX, εἰρήνη is used to translate the Hebrew word SHALOM, which carries a meaning of peace, completeness, welfare, health, and harmony in soul and mind (see WE Vine) and is both an internal and external quality.
Interestingly, another translation of the Hebrew word SHALOM is σωτηρία, which means safety, deliverance, preservation, and salvation. What a great occasion we have to be thankful, that God our Creator, has made us, his enemies, his Sons, through His Son Jesus Christ, in order to deliver us from destruction, make us complete, save our eternal souls, and unite us to Himself.
Now the God of peace, that brought again from the dead our Lord Jesus, that great shepherd of the sheep, through the blood of the everlasting covenant, Make you perfect in every good work to do his will, working in you that which is wellpleasing in his sight, through Jesus Christ; to whom be glory for ever and ever. Amen.
Hebrews 13:20-21 (KJV)