The doctrine
of the blessed Trinity is indeed complicated and construed as mysterious. This
is not to say that the Trinitarian doctrine cannot be understood entirely.
Rather, the
complication, in my opinion, is this: it is an ongoing effort of our
incorporeal (immaterial) mind dwelling in our corporeal (material) body and the
universe, which constantly experiences an intellectual struggle while trying to comprehend the underlying schema of two opposing architectures (Corporeal vs. Incorporeal)
inasmuch to understand the fullness of an uncaused, maximally great, incorporeal
being, namely God, who is wholly Trinitarian in nature. However, this
intellectual struggle could be conquered with the help of God Himself, who indwells
us (cf. John 14:23).
Thomistic
philosopher Ed Feser offers a positive outlook, “...when Trinitarian
theologians refer to the doctrine of the Trinity as a “mystery,” they do not
mean that it is self-contradictory or unintelligible. Nor do they mean that
there are no rational grounds for believing it. What they mean is that while it
is perfectly consistent and intelligible in itself, our minds are too limited
fully to comprehend it. And while, for that reason, the doctrine cannot be
arrived at “from scratch” by purely philosophical arguments, we can be
rationally justified in believing it on the basis of testimony, viz. the
testimony of Jesus Christ, whose reliability is demonstrated by His
resurrection...Furthermore, while human reason cannot fully grasp the Trinity
even after it has been revealed, it can show that no attempts to prove the
doctrine self-contradictory are successful...”1
Notwithstanding
this backdrop, we can still contend with questions related to the Blessed
Trinity. One such question is ‘Why are
we limited to only three persons in the Trinity?’ Why can’t there be one,
two, four, or more?
Medieval
Christian philosopher Thomas Aquinas posited the following:
1.
Argument from ontology: It is ontologically
impossible to have more than three persons in the Godhead of the Blessed
Trinity:2
“First,
the usual way you get multiple things from one thing is by cutting it into pieces,
as you might produce a temple's worth of marble pillars from a single slab of
marble. But that's not how we get the three Divine persons: we aren't cut God
into pieces. God is a single substance, and by His essence has no pieces; that
was determined by Thomas' initial argument for the existence of God. So how do
we get multiple persons? Here's Thomas' summary:
There cannot be more than three persons in God. For the divine persons cannot be multiplied by a division of their substance, but solely by the relation of some procession; and not by any sort of procession, but only by such as does not have its term in something outside of God.”
God
is an uncaused immaterial being. So God, eternally, is composed of three
persons. Since God cannot change, and since God is perfect, it would be metaphysically
impossible for God to have less or more than 3 persons.
2.
Argument from Perfection: Since God
is perfect, HE lacks nothing. Hence, the presence of three persons in the Blessed
Trinity construes perfection and since perfection lacks nothing, the Blessed
Trinity has no need for less or more persons:3
“Thomas now makes an argument from perfection: a thing is perfect of its kind if it lacks nothing that would make it more itself. Half-an-apple is half an apple; part of it is missing. And if a thing's nature is perfect, then there can't be more than one of it: the one thing of that kind must perfectly express its nature. This is true of the Son and the Spirit, so we can't have more than one of each.
Again: the perfect is that beyond which there is nothing.
Hence a being that would tolerate anything of its own class to be outside
itself, would fall short of absolute perfection. This is why things that are
simply perfect in their natures are not numerically multiplied... But both the
Son and the Holy Spirit must be simply perfect, since each of them is God, as
we have shown. Therefore several Sons or several Holy Spirits are impossible.”
So to
conclude, the blessed Godhead (the Blessed Trinity) can only have three persons.
Endnotes:
1http://edwardfeser.blogspot.com/2010/02/trinity-and-mystery.html
2https://www.patheos.com/blogs/crywoof/2015/11/todays-aquinas-why-a-trinity-why-not-a-quaternity/
3Ibid.
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