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.
from God our Father: It is significant that God is identified as "Father." This is largely a New Testament concept. It is true that some of the Old Testament prophets used this descriptive term with reference to God, but it remained for the Lord Jesus Christ to develop the idea fully.