Name Trinity; persons; one essence three subsistences
Moreover, by the word Trinity here we do not signify a ternary numbering number simply, but persons distinct in one essence. A person in God is a hypostasis or individual subsistence, incommunicable, living, rational, willing, powerful, and active John 5; 14.
But there are three persons, Father, Son, and Holy Spirit, not three Gods, because the essence or deity is one — Colossians 2:9; 1 John 5:7. Thus the orthodox fathers established the distinction from the words ousia and hypostasis. There are not three Gods, three Lords, and so on.
Person with the relations by which they are constituted are subsistences — John 14. Yet they are distinct not by reason alone but in the thing itself, by reason of a certain property and relation.
Latin
Caeterum, voce Trinitatis hic non numerum ternarium numerantem simpliciter, sed personas in una essentia distinctas significamus. Persona in Deo est hypostasis seu subsistentia individua, incommunicabilis, viva, intelligens, volens, potens, agens — Joh. V; XIV. Sunt autem tres personae, Pater, Filius et Spiritus Sanctus, non tres Dei, quia una est essentia seu deitas — Col. II.9; I Joh. V.7. Sic orthodoxi patres e voce ousia et hypostasis distinctionem constituerunt. Non sunt tres Dei, tres Domini, etc. Persona cum relationibus quibus constituuntur subsistentes sunt — Joh. XIV. Non sola tamen ratione, sed reipsa distinctae, di ratione cujusdam proprietatis et relationis.