Nasir al-Din al-Tusi Quotes

Nasir al-Din al-Tusi was a Persian polymath, philosopher, and astronomer who served first the Ismaili Nizari rulers of Alamut and then, after the Mongol conquest, the Ilkhanid court. From his observatory at Maragha he directed an international team of astronomers whose work on planetary models, including the Tusi couple, influenced both later Islamic astronomy and the development of European heliocentric thought. The quotes below are attributed to Nasir al-Din al-Tusi, organized by topic.