"The Mysteries of God...

...are to be adored, not investigated."- Philip Melanchthon, First Edition of the Loci Communes.

Blessed be the Holy Trinity and the undivided Unity. Let us give glory to him because he has shown his mercy to us! - Antiphon for Introit, Trinity Sunday

...You have given us grace to acknowledge the glory of the eternal Trinity by the confession of a true faith, and to worship the Unity in the power of the Divine Majesty... - Collect for Trinity

...In the confession of the only true God, we worship the Trinity in person and Unity in substance, of majesty coequal... - Proper Preface for Trinity

Trinity blessed, unity unshaken, goodness unbounded, very God of heaven,
Light of the angels, joy of those forsaken, hope of all living. - LSBB 504:2

Glory be to the Father and to the Son and to the Holy Spirit, as it was in the beginning, is now, and will be forever. Amen!