Paul, Silvanus, and Timothy, to the assembly of the Thessalonians in God the Father and the Lord Jesus Christ: Grace to you and peace from God our Father and the Lord Jesus Christ.
Grace and peace ... This was the usual order in which Paul extended this double greeting, varying it only in the closing verses of Ephesians.  They combined the highest form of both Greek and Hebrew salutations and were greatly enriched by theological implications of the highest significance. For example, "peace," which is a negative concept with us, means "the absence of strife"; whereas "The Hebrew equivalent, [shalom] (from which the word is derived), is concerned with `wholeness,' `soundness,' and signifies prosperity in the widest sense, especially prosperity in spiritual things."[4]