Introduction
It is generally taught, based on principles of Greek philosophy but also based on the Bible, that God is immutable, meaning "unchanging over time."
Arianism is named after the fourth-century presbyter Arius. Traditionally, "Arius … came ... to be regarded as a kind of Antichrist among heretics" (RW, 1). But more recently voices have gone up saying:
“Once we stopped looking at him from Athanasius’ perspective, we shall
have a fairer picture of his strength” (RW, 12-13).
Unfortunately, most of what we know about Arius comes from the writings of Athanasius. But three letters that Arius himself wrote have survived.
Traditionally, also, Arius' views have always been “represented as … some hopelessly defective form of belief” (RW, 2). But, more recently, Rowan Williams described Arius as “a thinker and exegete of resourcefulness, sharpness and originality” (RW, 116)
For that reason, it would be appropriate for us to take note of what Arius wrote. The purpose of this article is to explain why Arius described the Son as a created being but also as immutable.
Summary
Arius himself wrote:
“The Son of God … is, like the Father, 'unchangeable’” (RW, 96).
But Athanasius claimed that Arius taught the exact opposite, namely:
The Son is “like all others … subject to change” (RW, 100).
Arius’ bishop Alexander, in his letters, similarly stated “that Arius taught a mutable Logos, whose divine dignity is a reward for his unswerving spiritual fidelity” (RW, 104).
Explanation
In the Nicene Creed, the Son is begotten from the substance of the Father, implying that the Son has the same attributes as the Father, including immutability. Arius opposed this view but still described the Son as immutable. Rowan Williams explains Arius’ thinking as follows:
By nature, the Son does not possess any of the divine attributes (RW,
113-114). (These attributes would include immutability.) All the
divine attributes that the Son has, He has received from the Father.
He did not receive those divine attributes “because of virtue,” as
Alexander suggested (RW, 113). Instead, he had those attributes “from
the beginning” (RW, 113). There was no time when He was "not Wisdom
and Word” (RW, 114).
However, “as a rational creature he is mutable according to his
choice." And God did not overrule the Son's freedom by the divine
attributes God gave Him in ‘the beginning’ (RW, 114). Consequently,
the Son, in his pre-incarnate state and in his life on earth,
voluntarily remained faithful to God (RW, 114).
Therefore, when God endowed the Son with dignity “from the very
beginning of his existence,” He did that because He knew that the Son
“is and will always be worthy of the highest degree of grace” (RW,
114-5).
So, to conclude, why did Arius write that the Son is immutable while Athanasius claimed that Arius taught the opposite?
In Athanasius' view, only God is immutable. Since Arius taught that
the Son is distinct from God, Athanasius concluded that that means
that Arius described the Son as mutable.
Arius, on the other hand, did not describe the Son as immutable
because He cannot change; He is immutable because He will not change.
- End of Summary -
Source
This article is largely based on the book "Arius Heresy & Tradition," revised edition 2002, by Archbishop Rowan Williams. Williams is a world-class scholar and a trinitarian. Many authors have a section on Arius in their books but rely on what others have said about Arius. Williams, in contrast, has studied the ancient materials and must be regarded as a specialist in this field. This article uses "RW" to refer to this book.
The Contradiction
In the three letters of Arius that have survived, he wrote:
“The Son of God … is, like the Father, 'unchangeable’” (RW, 96).
He exists “stably and inalienably” (L, RW, 97).
“By the will of God, the Son is stably and unalterably what he is”
(RW, 98).
But Athanasius claimed that Arius taught the exact opposite of what he wrote in his letter, namely that:
The Son is “like all others … subject to change … because he is
changeable by nature” (Contra Arianos(v), RW, 100).
This quote is from Contra Arianos in which Athanasius paraphrases Arius’ theology. Wlliams said that this “has no parallel in S, nor any in Arius’ letters” (RW, 104). “S” stands for de synodis 15, the other work by Athanasius in which he seems to quote Arius’ actual words.
At the time, Alexander was Arius’ bishop and the Arian Controversy began as a dispute between these two. Williams mentions that two of the letters which Alexander wrote also “emphasize very strongly that Arius taught a mutable Logos, whose divine dignity is a reward for his unswerving spiritual fidelity” (RW, 104).
Explanation
Rowan Williams explains this apparent contradiction on pages 113-116 of his book. In summary, he wrote as follows:
For Arius, the Son “does not by nature possess any of the divine
attributes … his godlike glory and stability … and so must be given
them” (RW, 113-114).
The question then is whether Jesus was “promoted because of virtue”
(RW, 113), as Alexander claimed, or whether He had those divine
attributes from the ‘beginning’.
“Arius' scheme depends upon the fact that God bestows power and glory
upon the Son from the beginning” (RW, 113): “The Son (was) creative
Word and Wisdom and the image of the Father's glory from before the
world was made” (RW, 114). There was no “sort of change in his status
… (no) time when he is not Wisdom and Word” (RW, 114).
However, “as a rational creature he is mutable according to his choice
and what is to be avoided here is the suggestion that God overrules
the Son's freedom by his premundane (before the creation of the world)
gifts and graces” (RW, 114).
“We can conclude that Arius argued” (RW, 114) as follows:
“The Son, in his pre-incarnate state and in his life on earth voluntarily ‘loved righteousness and hated iniquity’” (RW, 114).
“Such an exercise of rational freedom is normally what fits us for transfiguring grace, the 'glory' of familiarity with God, so far as
any creature can be familiar with the unapproachable mystery of the
Father” (RW, 114).
“God, in endowing the Son with this dignity of heavenly intimacy from the very beginning of his existence, is therefore acting not
arbitrarily but rationally, knowing that his firstborn among creatures
is and will always be worthy of the highest degree of grace, a perfect
channel for creative and redemptive action, and so a perfect 'image'
of the divine” (RW, 114-5).
Conclusion
So, in conclusion, why did Arius write that the Son is immutable while Athanasius claimed that Arius taught the exact opposite?
In Athanasius' view, only God is immutable. Since Arius taught that
the Son is distinct from God, Athanasius concluded that that means
that Arius described the Son as mutable.
Arius, on the other hand, did not describe the Son as immutable
because He cannot sin; He is immutable because He will not sin. Arius
described the Son as the only being ever to be produced directly by
God (RPC Hanson, 7, The Search for the Christian Doctrine of God -
The Arian Controversy 318-381) and that He received "all the
gifts and glories God can give” (L, RW, 98). Therefore, "He is
different from any others" (De Synodis 15, RH, 14).
In another article, I argue that the Son came to this world to be tested. He was really tested. If it was impossible for Him to sin, His victory over sin would have been meaningless. See - Why did Jesus have to die?
But this question remains: Should we trust Athanasius' version of Arius' theology? Without explanation, he has directly contradicted what Arius himself wrote and presented that as Arius' teaching.