He also sees some potential for further development of revelation within Islam: Islam saw it as its original mission, according to Massignon, to spread the message of the oneness of God even by means of violence so as to force all idol-worshippers to acknowledge it. (Borrmans, 121) Yet, there is also a tendency of Islam towards non-violence, to be recognized most clearly in the self-offering on Mount Arafat during the hajj, the pilgrimage to Mecca. (Borrmans, 124) Massignon believes that the self-offering of Muslim saints in substitution for their brothers can make Islam go ahead on the way of revelation. He even showed great admiration for some of Islam's saints, especially for al-Hallaj.