Worship the Fullness of the Trinity

In reality and by nature it is the God of all, and His only-begotten Son and the Holy Spirit which are God.  This is distinctly taught us by the admirable Paul in the words “For although there may be so-called gods in heaven or on earth—as indeed there are many ‘gods’ and many ‘lords’—yet for us there is one God, the Father, from whom are all things and for whom we exist, and one Lord, Jesus Christ, through whom are all things and through whom we exist.” … [F]or the Father and His only begotten Son and His Holy Spirit are one God by nature; and the divine Word made man, our Lord Jesus Christ, is by nature one Son, only begotten of the Father; and the Comforter who completes the number of the Trinity is one Holy Spirit.  Thus though many are named fathers, we worship one Father, the Father before the ages, who Himself gave this title to men, as the Apostle says, “For this reason I bow my knees before the Father, from whom every fatherhood* in heaven and on earth is named.”  Let us not then, because others are called christs, rob ourselves of the worship of our Lord Jesus Christ.  For just as though many are called gods and fathers, there is one God and Father over all and before the ages; and though many are called sons, there is one real and natural Son; and though many are styled spirits there is one Holy Spirit; just so though many are called christs there is one Lord Jesus Christ by Whom are all things.  And very properly does the Church cling to this name.

Theodoret of Cyrus, Letter 146 to John Oeconomus, NPNF, Series 2

*  Theodoret's usage.