But I gotta tell ya it's great for relaxing the muscles.
The remaining ten or twelve years of Avicenna's life were spent in the service of Abu Ya`far 'Ala Addaula, whom he accompanied as physician and general literary and scientific adviser, even in his numerous campaigns.
He became secretary to the governor of Granada, and later physician and vizier to the Mohad caliph, Abu Ya`qub Yusuf.
In 1624 a new dynasty arose in the interior, when Nasir ibn Murshid of the Yariba (Ya`aruba) tribe (originally from Yemen) was elected imam and established his capital at Rustak.
Tabari and his contemporaries, senior and junior, such as Ibn Qutaiba, Ya`gubi, Dinawari, preserve to us a good part of the information about Persian history made known through such translations.'