Biographies are no longer written to explain or explore the greatness of the great. They redress balances, explore secret weaknesses, demolish legends.
The powers of the mind should be concentrated and the mind turned back upon itself; as the darkest places reveal their secrets before the penetrating rays of the sun, so will the concentrated mind penetrate its own innermost secrets.
All tastes have the quality of being in some way artificial and invented. The secret of life is to have enough detachment from your tastes and your values to see that they are a little bit absurd.
Muhammad has always been standing higher than the Christianity. He does not consider god as a human being and never makes himself equal to God. Muslims worship nothing except God and Muhammad is his Messenger. There is no any mystery and secret in it.