From my conversations with my Christian brethren, no one could show me any unambiguous direct quotes from Jesus saying anything about He, Him self is God or is a son of God?
Surely, it is such a grave issue for all human on earth and is a matter of life and death for the whole of eternity that Jesus failed to make it clear who he is and instead left it for others to interpret his mission on earth?
It is for our Christian brethrens to decipher what exactly Jesus said and done as there are lot of contradiction regarding him and who he really was.
As Muslims (meaning, someone who submits to the Will of God) we believe Prophet Muhammad (peace be upon him) and the final Testament that God sent to Him, the Qur'an. {note} The Qur'an is only in Arabic, everything else is just an translation. Muslims must believe in every single Messengers that God have sent to different nations over a period of time.
If it will help, here are just few translations from the Qur'an regarding Jesus:
O Muhammad, these are the "unseen" things, We are revealing to you: you were not present there when the priests of the Temple were casting lots by throwing their quills to decide which of them should be the guardian of Mary nor were you with them when they were arguing about it. Quran 3:44
And remember when the angels said, "O Mary, God sends you the good news of a Command of His: his name shall be Messiah, Jesus son of Mary. He will be highly honored in this world and in the Next World and he will be among those favored by God. He will speak to the people alike when in the cradle and when grown up, and he will be among the righteous." Hearing this, Mary said, "How, O Lord, shall I have a son, when no man has ever touched me?" "Thus shall it be," was the answer. God creates whatever He wills. When He decrees a thing, He only says, "Be" and it is. (Continuing their message, the angels added,) "And God will teach him the Book and wisdom, and give him the knowledge of the Torah and the Gospel, and appoint him as His Messenger to the children of Israel." Quran 3:45-49
(And when he came as a Messenger to the children of Israel, he said,) "I have come to you with a clear Sign from your Lord: in your very presence, I make the likeness of a bird out of clay and breathe into it and it becomes, by God's Command, a bird. I heal those born blind and the lepers and I bring to life the dead by God's Command: I inform you of what you eat and what you store up in your houses. Surely there is a great Sign for you in all this, if you have a mind to believe. And I have come to confirm those teachings of the Guidance of the Torah which are intact in my time. Lo! I have come with a clear Sign from your Lord; so fear God and obey me. Indeed God is my Lord, and also your Lord; therefore worship Him alone: that is the straight way." Quran 3:49-51
Throughout the entire Qur'an, God tells us about Himself and His attributes and the following verse is one such. (meaning in English)
"Allah – there is no deity except Him, the Ever-Living, the Sustainer of [all] existence. Neither drowsiness overtakes Him nor sleep. To Him belongs whatever is in the heavens and whatever is on the earth. Who is it that can intercede with Him except by His permission? He knows what is [presently] before them and what will be after them, and they encompass not a thing of His knowledge except for what He wills. His Kursi extends over the heavens and the earth, and their preservation tires Him not. And He is the Most High, the Most Great." [al-Qur'an, chapter 2: verses 255]
So, Muslims have clear understanding of who God is, what He wants us to do and who are Prophets, why were they sent and what will happen to us.
Of course, everyone is free to believe, not believe. That's true freedom. As God tells all human beings in the Qur'an:
"There shall be no compulsion in [acceptance of] the religion. The right course has become clear from the wrong. So whoever disbelieves in Taghut and believes in Allah has grasped the most trustworthy handhold with no break in it. And Allah is Hearing and Knowing."
Peace be to all.