Of course
@Katzpur, I'd be happy to clarify.
The word "being" is from the Greek
ousia and can also be translated into English as 'essence' or 'essential substance/nature' (i.e. some renderings of the Nicene Creed in English have, "
consubstantial with the Father" rather than "
of one Being with" but they really mean the same thing).
"Person" is from the Greek
hypostasis and can also mean 'underlying substance' but the sense in which Nicene'rs use it (the Trinitarian formula "
three hypostases in one ousia") is that 'ousia' is the general whilst 'hypostasis' is the particular. So, 'ousia' can be taken to mean the essential essence and nature of something, whereas 'hypostasis' can be taken to mean the individual relation of something to another. Likewise, the 'Trinity' means that there are three distinct
relations within
one single divine Being - or rather, "
three actions".
Indeed, 'person' (hypostasis) was first used in the context of Greek drama to refer to the 'relations' between different roles played by the one actor in a play. It doesn't mean what the English language implies with regards 'personhood' (i.e. individual centres of consciousness disembodied from one another). So, there aren't three individuals or gods or properties who make up God for Trinitarian Christians like myself. Nor is it 'modalism' because the three modes of being, actions or relations are noninterchangeable and distinctive without introducing any division into the Godhead.
'Being' refers to
what God is (one essence/substance/reality/isness), whereas 'person' refers to
who God is (Father, Son and Holy Spirit) in relation to both Himself and His creation. Thus, Nicene Christians say that there is One God, who is Father,
Son, and Holy Spirit.
Really, its a 'dynamic' and 'relational' understanding of God's eternal and immutable being (which is One).
A complicated, mysterious and indeed "
mystical" doctrine no doubt, but its what we believe.