Al-Biruni was not interested in treasure. When the Sultan returned from his raids, Al-Biruni asked only for one thing:
At first, Al-Biruni tried to talk to the Hindu priests using an interpreter. But the priest grew angry. "You are a foreigner, a mlechchha ," the priest said. "You cannot understand our Vedas. You cannot eat with us. You are impure."
Once he understood the language, Al-Biruni began writing. He did not write to praise or to condemn India. He wrote to describe it. He used a brilliant method: he would explain a Hindu idea, then immediately compare it to a similar idea from Greek philosophy or Islamic science. kitab al hind
In the year 1017 CE, a brilliant scholar from Central Asia named Al-Biruni was brought to the court of Sultan Mahmud of Ghazni. The Sultan was a conqueror, famously raiding the wealthy lands of India seventeen times. He brought back gold, jewels, and elephants.
He finished his book in 1030 CE. He called it Kitab fi Tahqiq ma li'l-Hind —"The Book of Verifying What Belongs to India." It had 80 chapters covering: Hindu religion, caste, marriage, astronomy, geometry, medicine, law, festivals, and even the game of chess. Al-Biruni was not interested in treasure
But the most important chapter was the first: "On the Difficulty of Understanding Another Nation."
In it, Al-Biruni wrote a warning that echoes even today: "The Hindus think there is no country like theirs, no science like theirs. And the Muslims think the same of their own. Each clings to custom and calls the other barbarian. But a wise traveler knows: custom is just the wall of a house—not the sky." "You are a foreigner, a mlechchha ," the priest said
Kitab al-Hind was not a bestseller in its time. Conquerors wanted maps of India’s treasure, not maps of its mind. But centuries later, historians realized: Al-Biruni had done something revolutionary. He had written the first objective, empathetic, and scholarly study of a civilization by an outsider.