Texts Explained; Ninthly, John 10:30; 17:11, etc. Arianexplanation, that the Son is one with the Father in will and judgment; but so are all good men, nay things inanimate; contrast of the Son. Oneness between Them is in nature, because oneness in operation. Angels not objects of prayer, because they do not work together with God, but the Son; texts quoted. Seeing an Angel, is not seeing God. Ariansin fact hold two Gods, and tend to Gentile polytheism. Arianexplanation that the Father and Son are one as we are one with Christ, is put aside by the Regula Fidei, and shown invalid by the usage of Scripture in illustrations; the true force of the comparison; force of the terms used. Force of 'in us;' force of 'as;' confirmed by St. John. In what sense we are 'in God' and His 'sons.'
18 If then, as we have many times said, the Word of God is the same with us, and nothing differs from us except in time, let Him be like us, and have the same place with the Father as we have; nor let Him be called Only-begotten, nor Only Word or Wisdom of the Father; but let the same name be of common application to all us who are like Him. For it is right, that they who have one nature, should have their name in common, though they differ from each other in point of time. For Adam was a man, and Paul a man, and he who is now born is a man, and time is not that which alters the nature of the race. If then the Word also differs from us only in time, then we must be as He. But in truth neither we are Word or Wisdom, nor is He creature or work; else why are we all sprung from one, and He the Only Word? But though it be suitable in them thus to speak, in us at least it is unsuitable to entertain their blasphemies. And yet, needless though it be to refine upon these passages, considering their so clear and religious sense, and our own orthodox belief, yet that their irreligion may be shown here also, come let us shortly, as we have received from the fathers, expose their heterodoxy from the passage. It is a custom with divine Scripture to take the things of nature as images and illustrations for mankind; and this it does, that from these physical objects the moral impulses of man may be explained; and thus their conduct shown to be either bad or righteous. For instance, in the case of the bad, as when it charges, 'Be not like to horse and mule which have no understanding. ' Or as when it says, complaining of those who have become such, 'Man, being in honour, has no understanding, but is compared unto the beasts that perish.' And again, 'They were as wanton horses.' And the Saviour to expose Herod said, 'Tell that fox;' but, on the other hand, charged His disciples, 'Behold I send you forth as sheep in the midst of wolves; be ye therefore wise as serpents and harmless as doves.' And He said this, not that we may become in nature beasts of burden, or become serpents and doves; for He has not so made us Himself, and therefore nature does not allow of it; but that we might eschew the irrational motions of the one, and being aware of the wisdom of that other animal, might not be deceived by it, and might take on us the meekness of the dove.
19. Again, taking patterns for man from divine subjects, the Saviour says; 'Be merciful, as your Father which is in heaven is merciful;' and, 'Be perfect, as your heavenly Father is perfect.' And He said this too, not that we might become such as the Father; for to become as the Father, is impossible for us creatures, who have been brought to be out of nothing; but as He charged us, 'Be not like to horse,' not lest we should become as draught animals, but that we should not imitate their want of reason, so, not that we might become as God, did He say, 'Be merciful as your Father,' but that looking at His beneficent acts, what we do well, we might do, not for men's sake, but for His sake, so that from Him and not from men we may have the reward. For as, although there be one Son by nature, True and Only-begotten, we too become sons, not as He in nature and truth, but according to the grace of Him that calls, and though we are men from the earth, are yet called gods, not as the True God or His Word, but as has pleased God who has given us that grace; so also, as God do we become merciful, not by being made equal to God, nor becoming in nature and truth benefactors (for it is not our gift to benefit but belongs to God), but in order that what has accrued to us from God Himself by grace, these things we may impart to others, without making distinctions, but largely towards all extending our kind service. For only in this way can we anyhow become imitators, and in no other, when we minister to others what comes from Him. And as we put a fair and right sense upon these texts, such again is the sense of the lection in John. For he does not say, that, as the Son is in the Father, such we must become:— whence could it be? When He is God's Word and Wisdom, and we were fashioned out of the earth, and He is by nature and essence Word and true God (for thus speaks John, 'We know that the Son of God has come, and He has given us an understanding to know Him that is true, and we are in Him that is true, even in His Son Jesus Christ; this is the true God and eternal life ') and we are made sons through Him by adoption and grace, as partaking of His Spirit (for 'as many as received Him,' he says, 'to them gave He power to become children of God, even to them that believe in His Name '), and therefore also He is the Truth (saying, 'I am the Truth,' and in His address to His Father, He said, 'Sanctify them through Your Truth, Your Word is Truth '); but we by imitation become virtuous and sons:— therefore not that we might become such as He, did He say 'that they may be one as We are;' but that as He, being the Word, is in His own Father, so that we too, taking an examplar and looking at Him, might become one towards each other in concord and oneness of spirit, nor be at variance as the Corinthians, but mind the same thing, as those five thousand in the Acts, who were as one.
20. For it is as 'sons,' not as the Son; as 'gods,' not as He Himself; and not as the Father, but 'merciful as the Father.' And, as has been said, by so becoming one, as the Father and the Son, we shall be such, not as the Father is by nature in the Son and the Son in the Father, but according to our own nature, and as it is possible for us thence to be moulded and to learn how we ought to be one, just as we learned also to be merciful. For like things are naturally one with like; thus all flesh is ranked together in kind; but the Word is unlike us and like the Father. And therefore, while He is in nature and truth one with His own Father, we, as being of one kind with each other (for from one were all made, and one is the nature of all men), become one with each other in good disposition, having as our copy the Son's natural unity with the Father. For as He taught us meekness from Himself, saying, 'Learn of Me for I am meek and lowly in heart,' not that we may become equal to Him, which is impossible, but that looking towards Him, we may remain meek continually, so also here wishing that our good disposition towards each other should be true and firm and indissoluble, from Himself taking the pattern, He says, 'that they may be one as We are,' whose oneness is indivisible; that is, that they learning from us of that indivisible Nature, may preserve in like manner agreement one with another. And this imitation of natural conditions is especially safe for man, as has been said; for, since they remain and never change, whereas the conduct of men is very changeable, one may look to what is unchangeable by nature, and avoid what is bad and remodel himself on what is best.
Source: Four Discourses Against the Arians (New Advent)