In the light of the foregoing discussions one can easily decide whether al-Bīrūnī was a good Muslim, a true and devoted believer or a bad Muslim as Professor Sachau maintained. In the preface (English edition) of Kitāb al-Âthâr al-Bāqiyah'an al-Qurūn al-Khāliyah (by al-Blriin) edited by Professor Sachau, the editor has claimed that al-Bīrūnī was (1) a bad Muslim (2) a despiser of the Arabs and of Arabic sciences and finally (3) he was not a Sunni-Muslim. How can al-Bīrūnī be a bad Muslim when he follows the Qur'in and Sunnah in a devoted fashion. His whole writing in Kitāb al-Jawāhir contradicts and rejects this theory of Sachau. No statement on ethics are made without having been supported from the Qur'in. The greatest good on earth was devotion to and service of human beings as explained in al-Futuwwah...