In My Father's house are many mansions; if it were not so, I would have told you.

Jesus knew that His disciples were troubled at the thought of His departure; So He reassured them by teaching them about the Father. And the Holy Spirit who will help them after His departure. If you believe in God, you should believe also in His Son whom He had sent. John 14:1-14, Jesus said,
Let not your heart be troubled; you believe in God believe also in Me 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, 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 will be also. And where I go you know, and the way you know, Thomas said to Him, Lord, we do not know where you are going, and how can we know the way? Jesus said to him, I am the way, the truth, and the life. No one comes to the Father except through Me. If you had known Me, you would have known My Father also; and from now on you know Him and have seen Him." Phillip said, Lord show us the Father, and it is sufficient for us. Jesus said, Have I been with you so long, and yet you have not known Me Phillip? he who has seen Me has seen the Father, so how can you say show us the Father? Don't you believe that I am in the Father and the Father in Me. The words I say are not just My own words, rather it is the Father, living in Me, Who is doing His work. Believe Me when I say that I Am in the Father, and the Father is in Me, are at lease believe on the evidence of the miracles, that I do. 

If you love Me keep My commandments. And I will pray the Father; and He shall give you another Comforter, that He may abide with you for ever; Even the Spirit of truth; whom the world cannot accept, because it neither sees Him are knows Him. But you know Him. For He lives with you and will be in you. I will not leave you Comfortless: I will come to you. Before long the world will not see Me any more, but you will see Me, because I live you will live also. On that day you will realize that I am in my Father, and you are in Me, and I am in you. Who ever has My commands and obeys them, he is the one who loves me. He who loves Me will be loved by My Father. And I too will love him and show My self to him. Jesus promise His disciples the gift of peace. while He was with them.[V 25-27 These things have I spoken, unto you, while being present with you, But the Comforter the Holy Spirit whom the Father will send, in My Name, He will teach you all things, and bring to your remembrance all things that I said to you. Peace I leave with you, My peace I give to you; not as the world gives do I give to you. Let non your heart be troubled, neither let it be afraid.

Jesus is not Only the Image of the Invisible God, But He is God Himself. Genesis 1:1, In The Beginning God Created the Heavens and The Earth. John 1:1, The Eternal Word of God, The true Light, Who Came into the world He Clearly displayed His Divine power and authority; John spoke plainly of His  nature, and of the power of His death, as an atonement for the sins of the world. John 1:1-2 In the Beginning was the Word, and the Word was with God, and the Word was God.He was in the beginning. And through Him was all things made: That has been made. The Holy Spirit, The Comforter whom Jesus send to be our Helper He is God. Romans 8: 14, For as many as are Led by the Spirit of God, these are the sons of God. 26, The Spirit also helps in our weaknesses, when we pray. The Spirit Himself makes intercession for us. God the Father, God the Son, God the Holy Spirit, work to gather as one God.