They say that "we have two eyes of the soul, and the benefit of vision through them is not the same. With one sight we see what is hidden in natural things, that is, God's power, His wisdom, and His providence for us, perceived through the greatness of His guidance of us. With the other sight we see the glory of His holy nature, when God is well pleased to bring us into the spiritual mysteries."
Since both are sight, what is seen by them is light. Since the benefit of the two kinds of sight is not the same, a certain duality appears in the vision of light.
By each sight a different light is seen, which is not seen by the other sight.
The divine Isaac explained to us what each of them is. He called one the apprehension of God's power, wisdom, and providence, and in general the knowledge of the Creator drawn from created things.
The other he called the vision, not of God's nature, lest slanderers again find a pretext for attack, but of "the glory of His nature."
This is the vision which the Lord gave to His disciples, and through them to all who have believed in Him and have shown their faith in deed. This is what He willed them to have.
"I desire," He says to the Father, "that these may behold My glory, which Thou hast given Me, having loved Me from the foundation of the world" (Jn 17:24).
And again: "Glorify Me, O Father, with Thyself, with the glory which I had with Thee before the world was" (Jn 17:5).
Thus He gave the glory of divinity also to human nature, but He did not give the divine nature itself. Therefore the divine nature is one thing, and its glory another, though they are not separated from one another.
At the same time, although the glory is distinct from God's nature, it cannot be numbered among things that exist in time. It surpasses existence and belongs ineffably to the nature of God.
God granted this glory, which surpasses all that exists, not only to the composite hypostatically united to Him, but also to the disciples.
"The glory which Thou hast given Me, O Father," says the Lord, "I have given them, that as We are one, so they may be one, I in them and Thou in Me, that they may be perfected in one" (Jn 17:22-23).
He also willed that the disciples should behold it. This glory is that by which we acquire God within ourselves and see Him in the proper sense of the word.
But how do we acquire and behold this glory of the divine essence? Is it by examining the laws of beings and through them grasping knowledge of divine wonderworking, wisdom, and providence?
No. All such things belong to the other sight of the soul. By it one cannot see the divine light, "the glory of His nature," according to what was said above by Saint Isaac and all the other Fathers.
Therefore the divine light is not the same as the light that shares its name with knowledge.
For this reason, God does not dwell in everyone who possesses knowledge of beings, or who sees by means of such knowledge. Such a person has only knowledge of creatures, from which he conjectures about God by probable reasoning.
By contrast, the mystical possessor of the divine light sees no longer from probability. He sees in true contemplation, which raises him above every creature.
He knows and possesses God within himself, because God is not separated from His eternal glory.
One need only not be troubled, nor lose hope because of the greatness of this benefaction. Rather, believing Him who became a partaker of our nature and imparted to it the glory of His own nature, one must seek how the gift of this vision is acquired.
And how is it acquired? By keeping the commandments. To the one who keeps them, the Lord promised His divine manifestation.
Afterward He also called this manifestation His own and the Father's dwelling, saying: "If anyone loves Me, he will keep My word, and My Father will love him, and We will come to him and make Our dwelling with him."
And again: "I will manifest Myself to him" (Jn 14:21, 23).
It is clear that by "word" here He means His commandments. Above, instead of the "word" mentioned here, He said "commandments."
"He who has My commandments and keeps them," He says, "it is he who loves Me" (Jn 14:21).
From this too it is clear, and precisely in direct relation to the philosopher's arguments and teachings, that the gracious vision of God is in no way knowledge of beings, however displeasing this may be to him.
Only one must remember that we do not call such vision knowledge because it surpasses knowledge. Likewise, we do not call God a being, for we believe that He is above being.
How then does it follow, against the philosopher's will, from his own arguments that the divine light is not the same as knowledge?
He says that the darkness of ignorance cannot be driven from the soul by keeping the commandments. He says that only learning and persistent study can do this.
What does not drive out ignorance can in no way give knowledge. Yet precisely what, according to him, does not give knowledge leads, according to the Lord's word, to the vision of God.
Therefore this vision of God is not knowledge.
It should be reckoned and called not merely non-knowledge or unknowable, except by loose usage and equivocation, or perhaps properly, but as something unique.
I say that this vision should be reckoned not only as scarcely knowledge, but as incomparably surpassing every knowledge and every knowing contemplation.
This is true if nothing is higher than God's indwelling and manifestation in us, and if nothing is equal or even close to it.
We know that the fulfillment of God's commandments also supplies knowledge, and true knowledge. For only in this way does health come.
How can the rational soul possess rationality if its faculty of knowledge is diseased?
Thus we know that God's commandments supply knowledge, but not knowledge alone. They also supply deification.
We receive this deification when we fully acquire and behold within ourselves, by the Spirit, the glory of God, whenever God is well pleased to bring us into His spiritual mysteries, according to the saint named above.
Since the saint mentioned Fathers who say the same thing, we too shall pass over all who lived after him. Let us see what the saints before him said about the glory of God.
Only the initiated behold this glory mysteriously and ineffably. First among them are the eyewitnesses and Apostles of the one God and Father of our Jesus Christ.
Through Him "every fatherhood" is named in the fullness of the Holy Church (Eph 3:15). Before the Apostles stands again their chief, Peter.
He says: "We did not follow cunningly devised fables when we made known to you the power and coming of our Lord Jesus Christ, but were eyewitnesses of His majesty" (2 Pet 1:16).
What glory of the Lord Jesus Christ did he witness? Let another Apostle show us: "When they were awake," he says, "Peter and those with him saw the glory of Christ" (Lk 9:32).
What was this glory? Let another Evangelist come forward and bear witness: "His face shone like the sun, and His garments became white as light" (Mt 17:2).
The Lord showed them that He is God, "clothing Himself with light as with a garment," according to the psalmist (Ps 103:2).
For this reason, after saying that he saw the glory of Christ "on the holy mountain," he speaks of the light that, wondrous to say, illumined even hearing.
For they saw there a luminous cloud sounding with words. After the vision of this glory of Christ, he says, "We have the prophetic word made more sure."
What prophetic word made more sure did you receive after the contemplation of the light, O seers of God? What could it be, except that God "clothes Himself with light as with a garment"?
"And you do well," says the Apostle, "to hold fast to this prophetic word, as to a lamp shining in a dark place, until the day dawns."
What day? Surely the day that shone on Tabor.
"And the morning star rises." What morning star? Surely the one that shone there upon Peter, James, and John.
"Until this morning star rises." Where? "In our hearts" (2 Pet 1:18-19).
Is it not clear that this light now shines in the hearts of the faithful and perfect?
Is it not clear that it immeasurably surpasses the light of knowledge?
It surpasses not only the knowledge acquired from Hellenic learning. Such knowledge is unworthy even to be called knowledge, since it is entirely false or mingled with falsehood.
It is closer to darkness than to light. I say that the light of this vision differs not only from this knowledge, but also from knowledge of the divine Scriptures.
The difference is so great that the light of knowledge may be compared to a lamp shining in a dark place. The light of mystical vision is like the morning star shining by day, that is, like the sun.
The glory of God is as transcendent above all that exists as God Himself. Dionysius the Areopagite calls God "non-existing" because He surpasses every kind of existence (Mystical Theology 5: PG 3, 1048A).
In the apocryphal Acts of the Apostles, expressions concerning the second Person of the Trinity include "Merciful Father, Savior Christ" and "I am the Father of all these ages."
Melito of Sardis also calls Christ Father in his Homily on the Passion of Christ, 9.
Theodoret of Cyrus speaks of the saving title of Jesus Christ, saying that He is "Father of the age to come, because as Adam is called father of the present age, so He is Father of the age to come" (Commentary on Isaiah 9:6).
The name Father for Christ also occurs in certain works ascribed to Saint Macarius of Egypt, and in ascetical and mystical writings of later centuries. Yet it is not found in the great teachers of the Church.
Its basis in Holy Scripture is Isa 9:6: "For unto us a Child is born, unto us a Son is given; the government is upon His shoulders, and His name shall be called Wonderful, Counselor, Mighty God, Father of eternity."