The Hypothesis: All the prophets, Gurus are the manifestations of "The God" or "The Nature" or "The Supreme Conscious" in Its/His efforts to put some sense into the humans bent upon selfdestruction at any cost. Prophet Mohammad, Jesus Christ, Buddha, Mahaveer, Sri Krishna are all the same.

The Question: Then, why do we have so many religious and so many different Holy books (The Quaran, The Bible and the Gita)

Imagine a professor who is considered a great authority in Physics. However he teaches one class each at a secondary-school, high school, pre-university and University everyday. At the secondary school he would say, "All matter is made of small particles called Atoms and Light is a form of energy.". At the High school, he would say that "Light also has particals, they are called photons". When at Pre-University he would say that "Light is an electro-magnetic wave" Finally at the University to his Phd students, he would reveal the ultimate. He would say "I dont know whether light is a particle or wave. These are the facts that support each theory. Now, you decide and debate!"

It was the same professor who taught all the classes. So, why did he speak differently? Was he trying to mislead his wards by being untruthful? No, I bet not! What he said depended on to whom he was teaching and how much they can absorb. He was only trying not to overwhelm them with more than they can chew. It is not that he didnt know the ultimate truth that he taught at the University when he was teaching at the secondary school.

In a similar way, The Supreme Conscious when takes form of a "Guru" teaches depending on the state of mind of the ward. Jesus had come when people were fighting each other for money and lust. Greed had taken over the mankind. So The Bible was addressed to common man and has ten commandments that had to say, "Dont Steal, Love thy neighbour, Dont be immoral..etc" . When Prophet Muhammad had come people must have forgotten God, overwhelmed by luxury, indulging in music, masti and women, fighting over whose God is Great (Different pagan religions worshipping different Gods which included idol worship) So Muhammad had to say "God is one. Dont worship the Idols. Worship the formless. Indulging in Music is sin, Women must be modestly dressed ...etc"

Then What about Bhagawat Geetha? To whom was it revealed? It was told to Arjuna, one of the most pious, righteous men at that time. Arjuna need not be told "Dont indulge in women" He need not be told "Dont steal"
And moreover, it was not revealed to Arjuna for no reason. Even he had to earn his worthiness. Arjuna and Krishna had been the best of pals since childhood. Did krishna not find time other than in the midst of the battle field to teach Arjuna? It was not revealed till then because Arjuna was not capable of absorbing The Gita till then. See, the Guru (here krishna) had no favouritism!!! Even if Arjuna was his best friend, Krishna didnt tell him till he was worthy to be told.

So Gita was revealed to the most pious and righteous man of the age, that too when he was at his best state of mind (state of Absolute surrender) and he beseeched Krishna to reveal the truth to him. (Arjuna says, I know not what to do. To you I surrender....Please tell me what to do)

Then the Guru had revealed "The Bhagawat Geeta" to Arjuna. While teaching such a worthy pupil, the Guru doesnt waste time in the trivia..(Not that they had any time for that on the battle-field ;)) So it is understandable that Gita has The Utlimate Truth in the most conscise way..that the Supreme Conscious would ever want to teach to a human !!

So Gita becomes better than Bible or Quran not by virtue of who taught it, but by virtue of to whom it was taught!!

Disclaimer: "Gita becomes better than Bible or Quran ..." It is just my opinion and mine alone. I found this logic that i have presented very acceptable. My bestest friend from kinder garden is a muslim and my second best friend is a christian. I have been to a Darga as well as church with them. So obviously i have enough and equal respect for all the religions and do not intend to insult or down play any religion or Holy Book.

Request: I know i am treading on dangerous ground. Please do not get emotional and try to quote sensational parts of Quran (Kill the Kafirs, polygamy for men..etc) or Gita(the caste system, untouchability...etc) to prove what you say. and at the same time do present any objective and complete logic that supports the hypothesis and answers the question

Krishna taught and Arjuna understood. And surely neither of them indulge in any of the crimes that the modern day Hinduism is charged with (untouchability..etc) If you and I misinterpret and misunderstand and fight ...it doesnt reflect badly on the Book. It shows our state of mind and our worthiness.

addendum:

I could not read Quran or Bible, though i would like to. But i did read Gita and it is a must read ! The best sloka that i often quote is

"Vidya vinaya sampanne brahmane gavi hastini
sunichaiva svapaakecha pandita sama darsanaha"

Which means "Only a person who can see that a scholarly brahmin,holy cow, elephant and a person who eats dog meat are all equal and can treat them equally can be called a pundit" (It is not enough if you externally treat them equally, you should be able to actually "see" (sama darsanaha) that they are equal)

Now, thats not what you call untouchability for sure !!!!!