What two Divine blessings did the Apostle Paul confer on the saints and on the overseers and deacons?

Grace and peace from the Father and from the Lord Jesus Christ. v2

Grace is the favor and blessing of God given to an individual so that his whole life is touched with Divine righteousness, holiness, protection, provision, fullness of joy, goodness, and mercy. In the ultimate sense, grace is the Presence of God through Christ.