That is according to historic, orthodox Christianity. God is one, that is, one being; we are told that numerous times in the Bible. Three beings can only mean tritheism.
This is exactly what got me in hot water with Christian Research Institute many years ago when I was leaving a modalistic cult that I had briefly joined. My formula was one Person equals three Persons. I was told, when corresponding with CRI, what you said, that it is a contradiction, or nonsense.
But in my mind, at the time, and even now, I think of the one God as both a "Being" and a "Person." When OT saints thought of God they thought of the one God as being one Divine Person, I would think--not just one Being. I'm not sure the biblical language makes such a distinction?
Anyway, I think the ancient Hebrews may have understood the composite nature of God's unity, because they could read God say, "Let us make man." But they certainly thought of Him as a single Divine Person, as I see it!
So, I've had to modify my own personal formula to avoid misunderstanding and to avoid creating confusion with those who have a different, seemingly contradictory formula. I now state that the one Divine Person is expressed as an infinite Person, whereas the Trinitarian Persons are finite expressions of the same infinite Divine Person.
Nobody has to accept my formula--it just satisfies me. ;) Others are sometimes thrown off when I say that the Trinitarian Persons are "finite expressions," because they quickly argue that God and His Persons are not "finite."
But any expression that we can conceive of must be finite by nature because we ourselves are finite by nature and cannot, by definition, understand anything that transcends our finite, limited nature.
We can experience the infinite Person and revelation of God because He condenses His reality in order to be experienced by us. But this is the limit to which we can experience the infinite God.
We cannot experience God beyond the condensed product of His revelation, which is what the word of God is to us, as well as the Son and the Spirit. Even the conception of the Father is understood by a condensed version that represents Him to us and for us.
The Trinity was carefully defined to avoid contradiction. We cannot say that the one Being is three Beings, nor that one Person is three Persons. Those are nonsense because they are self-contradictory. It is one Being that exists as three coeternal, coequal Persons.
You're quite right in using the original formula. It just never explained the difference between God as a Being and God as a Person. How can a Being not be a Person?
But I do understand and accept the formula, even if it doesn't offer me understanding personally. I just don't have any problem with "One Infinite Person equals Three Finite Persons."
