1. Let not your heart be troubled: you believe in God, believe also in me.
2. In my Father's house are many mansions: if it were not so, I would have told you. I go to prepare a place for you.
3. And if I go and prepare a place for you, I will come again, and receive you to myself; that where I am, there you may be also.
4. And where I go you know, and the way you know.
AUG. Our Lord consoles His disciples, who, as men, would be naturally alarmed and troubled at the idea of His death, by assuring them of His divinity: Let not your heart be troubled: you believe in God, believe also in Me; as if they must believe in Him, if they believed in God; which would not follow, unless Christ were God. you are in fear for this form of a servant; let not your heart be troubled; the form of God shall raise it up.
CHRYS. Faith, too, in Me, and in the Father that begat Me, is more powerful than anything that shall come upon you; and will prevail in spite of all difficulties. He shows His divinity at the same time by discerning their inward feelings: Let not your heart be troubled.
AUG. And as the disciples were afraid for themselves, when Peter, the boldest and most zealous of them, had been told, The cock shall not crow, till you have denied Me thrice, He adds, In My Father's house are many mansions, by way of an assurance to them in their trouble, that they might with confidence and certainty look forward, after all their trials, to dwelling together with Christ in the presence of God. For though one man is bolder, wiser, juster, holier than another, yet no one shall be removed from that house of God, but each receive a mansion suited to his deserts. The penny indeed which the householder paid to the laborers who worked in his vineyard, was the same to all; for life eternal, which this penny signifies, is of the same duration to all. But there may be many mansions, many degrees of dignity, in that life, corresponding to people's deserts.
GREG. The many mansions agree w with the one penny, because, though one may rejoice more than another, yet all rejoice with one and the same joy, arising from the vision of their Maker.
AUG. And thus God will be all in all; that is, since God is love, love will bring it to pass, that what each has, will be common to all. That which one loves in another is one's own, though one have it not one's self. And then there will be no envy et superior grace, for in all hearts will reign the unity of love.
GREG Nor is there any sense of deficiency in consequence of such inequality; for each will feel as much as suffices for himself.
AUG. But they are rejected by the Christians, who infer from there being many mansions that there is a place outside the kingdom of heaven, where innocent souls, that have departed this life without baptism, and could not there enter into the kingdom of heaven, remain happy. But God forbid, that when every house of every heir of the kingdom is in the kingdom, there should be a part of the regal house itself not in the kingdom. Our Lord does not say, In eternal bliss are many mansions, but they are in My Father's house.
CHRYS. Or thus: Our Lord having said above to Peter, Where I go, you can not follow Me now, but you shall follow Me afterwards, that they might not think that this promise was made to Peter only, He says, In My Father's house are many mansions; i.e. You shall be admitted into that place, as well as Peter, for it contains abundance of mansions, which are ever ready to receive you: If it were not so, I would have told you: I go to prepare a place for you.
AUG. He means evidently that there are already many mansions, and that there is no need of His preparing one.
CHRYS. Having said, you can not follow Me now, that they might not think that they were cut off for ever, He adds: And if I go and prepare a place for you, I will come again area receive you to Myself, that where I am, there you may be also: a recommendation to them to place the strongest trust in Him.
THEOPHYL. And if not, I would have told you: I go to prepare, &c. As if He said; Either way you should not be troubled, whether places are prepared for you, or not. For, if they are not prepared, I will very quickly prepare them.
AUG. But why does He go and prepare a place, if there are many mansions already? Because these are not as yet so prepared as they will be. The same mansions that He has prepared by predestination, He prepares by operation. They are prepared already in respect of predestination; if they were not, He would have said, I will go and prepare, i.e. predestine, a place for you; but inasmuch as they are not yet prepared in respect of operation, He says, And if I go and prepare a place for you.
And now He is preparing mansions, by preparing occupants for them. Indeed, when He says, In My Father's house are many mansions, what think we the house of God to be but the temple of God, of which the Apostle said, The temple of God is holy, which temple you are (1 Cor 3:17). This house of God then is now being built, now being prepared.
But why has He gone away to prepare it, if it is ourselves that He prepares: if He leaves us, how can He prepare us? The meaning is, that, in order that those mansions may be prepared, the just must live by faith and if you see, there is no faith. Let Him go away then, that He be not seen; let Him be hid, that He be believed. Then a place is prepared, if you live by faith: let faith desire, that desire may enjoy. If you rightly understands Him, He never leaves either the place He came from, or that He goes from. He goes, when He withdraws from sight, He comes, when He appears. But except He remain in power, that we may grow in goodness, no place of happiness will be prepared for us.
ALCUIN. He says then, I go, by the absence of the flesh, I shall come again, by the presence of the Godhead; or, I shall come again to judge the quick and dead. And as He knew that they would ask where He went, or by what way He wells, He adds, And whither I go you know, i.e. to the Father, and the way you know, i.e. Myself.
CHRYS. He show them that He is aware of their curiosity to know His meaning, and thus excites them to pelt questions to Him.
5. Thomas said to him, Lord, we know not where you go; and how can we know the way?
6. Jesus said to him, I am the way, the truth, and the life: no man comes to the Father, but by me.
CHRYS. If the Jews, who wished to be separated from Christ, asked where He was going, much more would the disciples, who wished never to be separated from Him, be anxious to know it. So with much love, and, at the same time, fear, they proceed to ask: Thomas said to Him, Lord, we know not where you go; and how can we know the way?
AUG. Our Lord had said that they knew both, Thomas says that they knew neither. Our Lord cannot lie; they knew not that they did know. Our Lord proves that they did: Jesus said to Him, I am the way, the truth, and the life.
AUG. As it He said, I am the way, whereby you would go; I am the truth, whereto you would go; I am the life, in which you would abide. The truth and the life every one understands; but not everyone has found the way. Even the philosophers of the world have seen that God is the life eternal, the truth which is the end of all knowledge.
And the Word of God, which is truth and life with the Father, by taking upon Him human nature, is made the way. Walk by the Man, and you will arrive at God. For it is better to limp on the right way, than to walk ever so stoutly by the wrong.
HILARY. For He who is the way does not lead us into devious courses out of the way; nor does He who is the truth deceive us by falsehoods; not does He who is the life leave us in the darkness of death.
THEOPHYL. When you art engaged in the practical, He is made your way; when in the contemplative, He is made your truth. And to the active and the contemplative is joined life: for we should both act and contemplate with reference to the world to come.
AUG. They knew then the way, because they knew He was the way. But what need to add, the truth, and the life? Because they were yet to be told whither He went. He went to the truth; He went to the life. He went then to Himself, by Himself. But did you leave Yourself, O Lord, to come to us? I know that you took upon you the form of a servant; by the flesh you came, remaining where you were; by that you returned, remaining where you had come to. It by this then you came, and returned, by this you were the way, not only to us, to come to you, but also to Yourself to come, and to return again. And when you went to life, which is Yourself you raised that same flesh of Your from death to life.
Christ therefore went to life, when His flesh arose from death to life. And since the Word is life, Christ went to Himself; Christ being both, in one person, i.e. Word-flesh. Again, by the flesh God came to men, the truth to liars; for God is true, but every man a liar. When then He withdrew Himself from men, and lifted up His flesh to that place in which no liar is, the same Christ, by the way, by which He being the Word became flesh, by Himself, i.e. by His flesh, by the same returned to Truth, which is Himself, which truth, even amongst the liars He maintained to death.
Behold I myself, if I make you understand what I say, do in a certain sense go to you, though I do not leave myself. And when I cease speaking, I return to myself, but remain with you, if you remember what you have heard. If the image which God has made can do this, how much more the Image which God has begotten? Thus He goes by Himself, to Himself and to the Father, and we by Him, to Him and to the Father.
CHRYS. For if, He says, you have Me for your guide to the Father, you shall certainly come to Him. Nor call you come by any other way. Whereas He had said above, No man can come to Me, except the Father draw him, now He says, No man comes to the Father but by Me, thus equaling Himself to the Father. The next words explain, Where I go you know, and the way you know.
If you had known Me, He says, you should have known My Father also; i.e. If you had known My substance and dignity, you would have known the Father's. They did know Him, but not as they ought to do. Nor was it till afterwards, when the Spirit came, that they were fully enlightened.
On this account He adds, And from henceforth you know Him, know Him, that is, spiritually. And have seen Him, i.e. by Me; meaning that he who had seen Him, had seen the Father. They saw Him, however, not in His pure substance, but clothed in flesh.
Catena Aurea John 14
On the Feast of Saint Mark, April 25 1467, the people of Genazzano, Italy witnessed a marvellous sight. A cloud descended upon an ancient church dedicated to Our Lady of Good Counsel. When the cloud disappeared, an image of Our Lady and the Child Jesus was revealed which had not been there before. The image, on a paper-thin sheet, was suspended miraculously. 
Emperor Vespasian reigned in Rome when Cletus assumed leadership of the Church. His specific responsibilities, like those of his predecessor Linus, can only be surmised because a monarchial episcopate had not yet emerged in Rome. Little is known of Cletus, perhaps due to the confusion over his name. Some historians refer to him as Anacletus or, more correctly, Anencletus, which is a Greek adjective meaning "blameless." There is, however, no doubt that he is recognized as the third successor and is commemorated in the ancient canon of the Mass. 
St. Marcellinus was Pope during the Diocletian persecution (296-304). With wise forethought he ordered large rooms to be constructed in the catacombs for liturgical use. Such a chamber in the catacomb of Callistus still recalls his action. According to one ancient account (certainly erroneous), this pope strewed incense before the gods when arrested during the persecution, but later atoned for his weakness by a glorious martyrdom. His grave in the catacomb of Priscilla was an object of highest honor. 