Invite (all) to the way of thy Lord with wisdom and beautiful preaching; and argue with them in ways that are best and most gracious: for thy Lord knoweth, best who have strayed from His Path, and who receive guidance. (Qur'an 16:125)
Jesus (pbuh) indicated that he was God when he said, "I am the way, the truth, and the life: no man cometh unto the Father, but by me".
1.Gospel of John Chapter 14 verses 1 – 6
Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.
In order to understand the verse better we should read the context i.e. Gospel of John chapter 14 verse 1 to 6
"Let not your heart be troubled: ye believe in God, 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 unto myself; that where I am, there ye may be also.
And whither I go ye know, and the way ye know.’
Thomas saith unto him, ‘Lord, we know not whither thou goest; and how can we know the way?’
Jesus saith unto him, ‘I am the way, the truth, and the life: no man cometh unto the father, but by me.’"
2.EVERY PROPHET IN HIS TIME IS THE WAY TO GOD
Jesus (pbuh) being a prophet of God rightly said that he was the way to God. Every Prophet of God, is the truth and the way to God. Moses (pbuh) during his time and for his nation was the way, the truth and life and no man could come to God but through Moses (pbuh). Every prophet of God in his time is the ultimate path and guidance to God.
Today the last and final messenger of God is prophet Muhammad (pbuh) who is the way, the truth and the life; no man comes unto God but through his teachings.
3. JESUS (PBUH) SAID HE THAT HAS SEEN ME HAS SEEN THE FATHER
Some Christians consider that Jesus (pbuh) by stating that "he that hath seen me hath seen the Father" in the verses to follow is a proof that Jesus (pbuh) claimed divinity. If you further read it is mentioned in Gospel of John, 14 verse 7 to 10:
"‘If ye had known me, ye should have known my Father also: and from henceforth ye know him, and have seen him.’
Philip saith unto him, ‘Lord, shew us the Father, and it sufficeth us.’
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?
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."
4.KNOWING GOD IS SEEING GOD
Jesus (pbuh) says in the verse no 7
"If ye had known me, ye should have known my Father also: and from henceforth ye know him, and have seen him."
Seeing according to Jesus (pbuh) means knowing. Thus he who knows Jesus (pbuh), also knows God. The miracles and works of the prophet (pbuh) bear testimony to the existence of God.