Prayer on the Festival of Holy Trinity

O THOU Incomprehensible, eternal God, Thou King of kings and Lord of lords, who alone hast immortality, and dost dwell in a light to which no one can approach: we thank Thee in humility of heart, that Thou hast left Thy realm of light to reveal Thyself to us as the One God in Three Persons. But since this deep mystery of the Holy Trinity far transcends all our thoughts and conceptions, we pray Thee above all, to make our reason, which is wise in its own conceit, subject to your obedience, and do not suffer the foolishness of our reason to oppose Thy wisdom. And do Thou imprint on our hearts this living and confiding knowledge, that Thou art Three and One, in order that we may cherish this truth as a precious treasure over against all error and may, in deepest humility, revere Thee, O Triune God, with like honor, as revealed in Thy Word.

Grant unto us, O Holy Father, to know that Thou dost originate from no one, but hast begotten Thy Son from eternity and dost cause the Holy Spirit to proceed from Thee and Him; furthermore, do Thou grant us to know that Thou hast given Thyself unto us as our Father, so that, in childlike obedience and confidence, we consecrate everything to Thee that is Thy work in us. O Lord Jesus Christ, Thou eternal Son of God, do Thou reveal Thyself to us as having from eternity been begotten of Thy heavenly Father, the brightness of His glory and the image of his being, Light of Light and very God of very God. May we realize that out of love to us Thou didst become our brother, and hast redeemed us by Thy obedience, suffering, and death, to the end that in Thee we may learn to know the Father aright and through Thee come to Him, enjoying the fruits of Thy redemption, here in righteousness and holiness and hereafter in the communion of Thy glory. O Lord God Holy Ghost, enlighten our souls to know that Thou didst proceed as the essential Breath from the Father and the Son from eternity, true God and a true person, and that Thou dost labor faithfully at the work of our sanctification. O do Thou zealously continue the same by enlightening us, purging us. urging us to perform good deeds, comforting us and preserving us, so that by Thy operation we may, when our time comes, appear perfectly holy and pure before the throne of Thy glory.

For Thine eternal majesty and glory revealed to us in Thy Word, for all the grace and the benefits Thou hast bestowed upon us, we and all Thy creatures do render unto Thee, O Holy Trinity, praise, honor, thanks and glory. Amen.