From: John 14:1-6
Jesus Reveals the Father
(Jesus said to His disciples,)  "Let not your hearts be troubled; believe in God, believe also in Me.  In My Father's house are many rooms; if it were not so, would I have told you that I go to prepare a place for you?  And when I go and prepare a place for you, I will come again and will take you to Myself, that where I am you may be also.  And you know the way where I am going."  Thomas said to Him, "Lord, we do not know where You are going; how can we know the way?"  Jesus said to him, "I am the Way, and the Truth, and the Life; no one comes to the Father, but by Me."
1-3. Apparently this prediction of Peter's denial has saddened the disciples. Jesus cheers them up by telling them that He is going away to prepare a place for them in Heaven, for Heaven they will eventually attain, despite their shortcomings and dragging their feet. The return which Jesus refers to includes His Second Coming (Parousia) at the end of the world (cf. 1 Corinthians 4:5; 11:26; 1 Thessalonians 4:16-17; 1 John 2:28) and His meeting with each soul after death: Christ has prepared a Heavenly dwelling-place through His work of redemption. Therefore, His words can be regarded as being addressed not only to the Twelve but also to everyone who believes in Him over the course of the centuries. The Lord will bring with Him into glory all those who have believed in Him and have stayed faithful to Him.
4-7. The Apostles did not really understand what Jesus was telling them: hence Thomas' question. The Lord explains that He is the way to the Father. "It was necessary for Him to say `I am the Way' to show them that they really knew what they thought they were ignorant of, because they knew Him" (St. Augustine, "In. Ioann. Evang.", 66, 2).
Jesus is the way to the Father--through what He teaches, for by keeping to His teaching we will reach Heaven; through faith, which He inspires, because He came to this world so "that whoever believes in Him may have eternal life" (John 3:15); through His example, since no one can go to the Father without imitating the Son; through His merits, which make it possible for us to enter our Heavenly home; and above all He is the way because He reveals the Father, with whom He is one because of His divine nature.
"Just as children by listening to their mothers, and prattling with them, learn to speak their language, so we, by keeping close to the Savior in meditation, and observing His words, His actions, and His affections, shall learn, with the help of His grace, to speak, to act, and to will like Him.
"We must pause here...; we can reach God the Father by no other route...; the Divinity could not be well contemplated by us in this world below if it were not united to the sacred humanity of the Savior, whose life and death are the most appropriate, sweet, delicious and profitable subjects which we can choose for our ordinary meditations" (St. Francis de Sales, "Introduction to the Devout Life", Part II, Chapter 1, 2).
"I am the way": He is the only path linking Heaven and Earth. "He is speaking to all men, but in a special way He is thinking of people who, like you and me, are determined to take our Christian vocation seriously: He wants God to be forever in our thoughts, on our lips and in everything we do, including our most ordinary and routine actions.
"Jesus is the way. Behind Him on this Earth of ours He has left the clear outlines of His footprints. They are indelible signs which neither the erosion of time nor the treachery of the Evil One have been able to erase" ([St] J. Escriva, "Friends of God", 127).
Jesus' words do much more than provide an answer to Thomas' question; He tells us: "I am the Way, and the Truth, and the Life". Being the Truth and the Life is something proper to the Son of God become man, who St. John says in the prologue of his Gospel is "full of grace and truth" (1:14). He is the Truth because by coming to this world He shows that God is faithful to His promises, and because He teaches the truth about who God is and tells us that true worship must be "in spirit and truth" (John 4:23). He is Life because from all eternity He has divine life with His Father (cf. John 1:4), and because He makes us, through grace, sharers in that divine life. This is why the Gospel says: "This is eternal life, that they know Thee, the only true God, and Jesus Christ whom Thou has sent" (John 17:3).
By His reply Jesus is, "as it were, saying, By which route do you want to go? I am the Way. To where do you want to go? I am the Truth. Where do you want to remain? I am the Life. Every man can attain an understanding of the Truth and the Life; but not all find the Way. The wise of this world realize that God is eternal life and knowable truth; but the Word of God, who is Truth and Life joined to the Father, has become the Way by taking a human nature. Make your way contemplating His humility and you will reach God" (St. Augustine, "De Verbis Domini Sermones", 54).
Source: "The Navarre Bible: Text and Commentaries". Biblical text taken from the Revised Standard Version and New Vulgate. Commentaries made by members of the Faculty of Theology of the University of Navarre, Spain. Published by Four Courts Press, Kill Lane, Blackrock, Co. Dublin, Ireland. Reprinted with permission from Four Courts Press and Scepter Publishers, the U.S. publisher.