"Confession of the Holy Trinity" (Saint Ephraim the Syrian)

ne person is the Father, and one person is the Son, and one person is the Holy Spirit — one Divinity, one power, one kingdom in three persons or hypostases.

So let us glorify the holy Unity in the Trinity and the Holy Trinity in Unity. This is the confession of the holy ecumenical Church of God!

The Church baptizes unto eternal life in the Holy Trinity, Whom she sanctifies with equal honor, confesses indivisibly and eternally, worships sinlessly, and glorifies unceasingly.

To this Tri-hypostatic unity — to the Father, Son, and Holy Spirit — are due glory, gratitude, honor, power, and greatness unto the ages.

From A Spiritual Psalter or Reflections on God, compiled from the works of Saint Ephraim the Syrian