1 Let not your heart be troubled: ye believe in God, believe also in me.

[Let not your heart be troubled] After having answered Peter's question, he addresses himself again to his disciples, and tells them to not be distressed at his leaving them, nor to lose courage because of what he said concerning Peter's denying him. If they placed their confidence in God, he would protect them. No matter how they might see him treated, they should believe in him more firmly, as his sufferings, death and resurrection should be to them the most positive proof of his being Messiah, the Savior of the world.

[Ye believe in God, believe also in me] It is best to read both the verbs in the imperitive mode: - Place your confidence in God, and in me as the Mediator betwen God and man, verses 12-14, and expect the utmost support from God; but expect it all through me. The disciples began to lose all hope of a secular kingdom, and were discouraged in consequence; Christ promised them a spiritual and heavenly inheritance, and thus lifted up their drooping hearts.

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.

[Many mansions] Though I said before that where I am going you cannot come now, yet do not think that we will be forever separated. I am going to where my Father dwells, where there is not only a place of supreme eminence for myself, but also places for all of my disciples.

[If not...I would have told you.] If there would not be places for you in Heaven, I would not have permitted you to indulge a vain hope concerning future blessedness.

3 And if I go and prepare a place for you, I will come again, and receive you unto myself; that where I am, there ye may be also.

[And if I go] And when I shall have gone and prepared a place for you I will return for you that you might be with me forever. See 1 Thessalonians 4:16-18 and Revelation 19:7-9 for an expanded description of this event. This return to receive his own, often termed "the rapture", is an event separate from and preceeding, Christ's return to earth as KING OF KINGS AND LORD OF LORDS to establish his one thousand year long earthly kingdom. (Revelation 19:11-16).

4 And whither I go ye know, and the way ye know.
5 Thomas saith unto him, Lord, we know not whither thou goest; and how can we know the way?

The Jews understood from the Scriptures that Messiah would set up an earthly kingdom. It was very difficult for them to grasp that the earthly kingdom was still in the future. Thomas appears to have been thinking that Christ intended to go to some other location on earth to set up his kingdom.

6 Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.

[I am the way] That leads to the Father; the truth that teaches the knowledge of God; the life that animates all who seek and serve him, and which is to be enjoyed eternally at the end of the way.

[No man cometh unto the Father, but by me.] Neither by philosophy, nor creed, nor good works, nor birthright. With such an important issue at stake, it is worth the effort to study Christ and his teachings to determine the validity of such a statement.

7 If ye had known me, ye should have known my Father also: and from henceforth ye know him, and have seen him.

Because I and the Father are one, John 10:30.

8 Philip saith unto him, Lord, shew us the Father, and it sufficeth us.

[Lord, show us the Father] Philip was hoping for a glimpse of God, still somewhat unaware that he was in the presence of God, the Son.

9 Jesus saith unto him, Have I been so long time with you, and yet hast thou not known me, Philip? he that hath seen me hath seen the Father; and how sayest thou then, Shew us the Father?
10 Believest thou not that I am in the Father, and the Father in me? the words that I speak unto you I speak not of myself: but the Father that dwelleth in me, he doeth the works.

We are one, and those who have seen me have seen him that sent me.