Have they not stood upon the story of Moses with Al-Khidr, peace be upon them both, and how the master Moses was not capable of knowing what he saw while he was in his walking with the master Al-Khidr until Al-Khidr uncovered to him the reality of that? And in this is an indication that there are realities that a mere person does not understand, and meanings upon which anyone whosoever does not stand, and that two [persons] are not equal in the gnostic [attainment] and sight.