n this translation of the 17th book of the Revival of the Religious Sciences, Ghazali explains the different outer and inner reasons for travel. Outer reasons include the pilgrimage, the search for knowledge, and the flight from danger; while inner reasons include the acquisition of virtue and the disciplining of the soul. He then follows this with a practical chapter on the use of religious concessions while traveling and concludes with a final chapter on how the traveler is to establish the proper direction and times for prayer.