"Moreover, I speak of what I know and what I have seen, that is, I know with precision." For by the word "have seen" He indicates not bodily sight, but the most precise knowledge.
"But you do not accept Our testimony, that is, Mine." The Lord says this not to Nicodemus alone, but extends it to the entire race of the Jews, who to the end remained in unbelief.
Jn. 3:12. If I have told you earthly things and you do not believe, how will you believe if I tell you of heavenly things?
"If I have told you earthly things, and you do not believe," that is, if I told you about regeneration accomplished in baptism and you did not accept it, but asked "how?" (He calls this birth "earthly" because it takes place on earth for the benefit of people living on earth; although by grace and dignity it is heavenly, we are baptized while on earth). So if I spoke of this "earthly" birth and found you unbelieving, how will you believe if you hear of the ineffable heavenly birth by which the Only-begotten Son was born of the Father?
Some, however, understood "earthly" as referring to the example of the wind, so that the meaning of the passage is presented as follows: if I presented you an example from earthly things, and you were not convinced by it, then how can you learn things more exalted?
Jn. 3:13. No one has ascended into heaven, except He who descended from heaven, the Son of Man, who is in heaven.
And this, apparently, has nothing in common with what preceded it. But if one carefully examines the thought of the Lord, it will turn out that this too is closely related to what came before.
Since Nicodemus called the Lord a Teacher and a Prophet, He says: "Do not consider Me a prophet who is of the earth, sent by God to teach, but consider Me as having come down from above, as the Son, and not as being of the earth. None of the prophets ascended into heaven, but only I alone am to ascend, just as I also descended." Having heard that the Son of Man came down "from heaven," do not think that the flesh came down from heaven. Indeed, Apollinarius thought this way, that Christ, having a body from heaven, passed through the Virgin as through a channel. But since Christ, consisting of two natures, was one Hypostasis or one Person, the names of the Man are applied to the Word, and again the names of the Word are applied to the Man. So here also it is said that the "Son of Man" came down from heaven, because He is one Person and one Hypostasis. Then, lest you, having heard "who came down," should think that the One who came down is no longer in heaven, He says "who is in heaven." Therefore, having heard that I came down, do not think that I am not there; but I am both present here bodily and seated there with the Father in Divinity.
Jn. 3:14. And as Moses lifted up the serpent in the wilderness, so must the Son of Man be lifted up,
Jn. 3:15. So that everyone who believes in Him should not perish, but have eternal life.
Having spoken before about regeneration through baptism, he then speaks also of the benefaction accomplished for us through the cross. For the cross and death are the cause of the grace bestowed upon us through baptism, since in baptism we portray the death of the Lord.
He does not say directly that I will be crucified, but recalls the serpent and the ancient history (Num. 21:5–9), and in this way accomplishes several things at once: on the one hand, He teaches us that the old is akin to the new and that the Lawgiver of the Old and New Testaments is one and the same, although Marcion, Manes, and the rest of the assembly of such heretics reject the Old Testament, saying that it is the legislation of an evil demiurge (craftsman); on the other hand, He teaches that if the Jews escaped death by looking upon the bronze image of the serpent, then all the more shall we escape the death of the soul by looking upon the Crucified One and believing in Him. Compare, if you will, the type with the reality. There, a likeness of a serpent, having the appearance of a serpent but not having its venom: so too here, the Lord is Man, but free from the venom of sin, having come in the likeness of sinful flesh, that is, in the likeness of flesh subject to sin, but He Himself is not sinful flesh. Then, those who looked were delivered from bodily death, while we are delivered from spiritual death. Then, the one hung up healed from the bites of serpents, but now Christ heals the wounds inflicted by the dragon of the mind.
When you hear "must be lifted up," understand it thus: to be hung. For He was hung on high, so that He who sanctified the earth by walking upon it might also sanctify the air. Understand "to be lifted up" also thus: to be glorified. For the cross truly became the exaltation and glory of Christ. By that in which He seemed condemned, He condemned the prince of this world.
I will explain a little. Adam died justly, because he sinned. The Lord died not by a debt of justice, because He did not sin. Before the crucifixion of the Lord, death justly held dominion over men. But since the Lord was found to be without sin, what could the devil find in Him deserving of death? And since He was put to death unjustly, He conquered the one who killed Him, and in this way also freed Adam from the death that was justly inflicted upon him as one who had sinned.
And in another way. Two things dominated over the human race: pleasure and sorrow. The Lord, having passed through both, proved unconquerable. The tempter first approached Him on the mountain with the offer of pleasure (Matt. 4:3, 6, 9); but, finding Him unconquerable through this, he employed great cunning, bringing sorrow, so that at least through it he might master Him, and for this he raised up everything against Him: the denial of the disciples, the mockery of the soldiers, the blasphemy of the passersby, death at the hands of the Jews, but even in this he found Him unconquerable. For the sorrow on the cross could not arouse in the Lord hatred toward those who crucified Him, but He continued to love them and prayed for them, saying: "Father, do not hold this sin against them" (Luke 23:34). Do you see how He conquered by that through which He appeared to have been conquered? Thus, the cross became both His exaltation and His glory.
Jn. 3:16. For God so loved the world, that He gave His Only-Begotten Son,
The love of God for the world is great and extended so far that He gave not an angel, not a prophet, but His Son, and moreover His Only-Begotten (1 John 4:9). If He had given even an angel, that deed would not have been small. Why? Because an angel is His faithful and obedient servant, while we are enemies and apostates. But now, when He gave His Son, what surpassing love He showed! Again, if He had many sons and gave one, even that would have been a very great thing. But now He gave His Only-Begotten. Can His goodness then be worthily praised?
The Arians say that the Son is called Only-begotten because He alone was produced and created by God, while everything else was then created by Him. The answer to them is simple. If He had been called Only-begotten without the word "Son," then your subtle invention would have had a basis. But now, since He is called both Only-begotten and Son, the word "Only-begotten" cannot be understood as you understand it, but rather that He alone was begotten of the Father.
Note, I ask you, that just as above He said that the Son of Man came down from heaven, although the flesh did not come down from heaven, but He attributed what belongs to God to the man on account of the unity of the Person and the unity of the Hypostasis, so here again He attributes what belongs to the man to God the Word. "God gave," He says, "His Son to death." Although God remained impassible, yet since by Hypostasis One and the Same was both God the Word and Man subject to suffering, it is said that the Son is given over to death, who indeed also suffered in His own flesh.
Jn. 3:16. so that everyone who believes in Him should not perish, but have eternal life.
What is the benefit of the Son being given? It is great and inconceivable for man — that everyone who believes in Him should receive two blessings: one, that he should not perish; the other, that he should have life, and moreover eternal life. The Old Testament promised long life to those who pleased God in it, but the Gospel rewards such people with life not temporal, but eternal and indestructible.
Jn. 3:17. For God did not send His Son into the world to judge the world, but that the world might be saved through Him.
Since there are two comings of Christ, one that has already taken place and another that is future, concerning the first coming he says that the Son was not sent to judge the world (for if He had come for this purpose, all would have been condemned, since all have sinned, as Paul also says (Rom. 3:23)), but He came primarily to save the world. Such was His purpose. But in practice, it turned out that He condemns those who did not believe. The Law of Moses came primarily for the exposure of sin (Rom. 3:20) and the condemnation of transgressors. For it pardoned no one, but as soon as it found someone sinning in anything, it immediately imposed punishment as well. Thus, the first coming did not have as its purpose to judge, except for those who in practice did not believe, for they are already condemned; but the second coming will be expressly for the purpose of judging all and rendering to each according to his deeds.
Jn. 3:18. He who believes in Him is not judged,
What does "he who believes in the Son is not judged" mean? Is he really not judged if his life is impure? He is very much judged. For Paul does not even call such people truly believing. "They profess," he says, "that they know God, but by their works they deny Him" (Tit. 1:16). However, here he is speaking about the fact that one is not judged for the very reason that he believed: although he will give the strictest account for evil deeds, he is not punished for unbelief, because he once believed.