As I explained in the previous section that if manufacturer creates a new instrument, he does not become the instrument to know what is good or what is bad for the instrument. He writes instruction manual. Similarly, our Lord and Creator Allah (swt) need not take human form to know what is good or bad for the human being. He chooses to reveal the instruction manual. The last and final instruction manual of the human beings is the Glorious Qur'an. The 'dos' and 'don'ts' for the human beings are mentioned in the Qur'an.
If you allow me to compare human beings with machines, I would say humans are more complicated than the most complex machines in the world. Even the most advanced computers, which are extremely complex, are pale in comparison to the myriad physical, psychological, genetic and social factors that affect individual and collective human life.
The more advanced the machine, greater is the need for its instruction manual. By the same logic, don't human beings require an instruction manual by which to govern their own lives?
Allah (swt) need not come down personally for giving the instruction manual. He chooses a man amongst men to deliver the message and communicates with him at a higher level through the medium of revelations. Such chosen men are called messengers and prophets of God.
Some people are 'blind' and 'deaf': Despite the absurdity of the philosophy of anthropomorphism, followers of many religions believe in and preach it to others. Is it not an insult to human intelligence and to the Creator who gave us this intelligence? Such people are truly 'deaf' and 'blind' despite the faculty of hearing and sight given to them by Allah. The Qur'an says:
Deaf, dumb, and blind - They will not return (to the path).
The Bible gives a similar message in the Gospel of Matthew:
"Seeing they see not; and hearing they hear not, neither do they understand."
A similar message is also given in the Hindu Scriptures in the Rigveda.
"There maybe someone who sees the words and yet indeed does not see them; may be another one who hears these words but indeed does not hear them."
All these scriptures are telling their readers that though the things are made so clear yet many people divert away from the truth.