Surah 18. Al-Kahf, Ayah 68

Lit., "that thou dost not encompass with [thy] experience (khubran)": according to Razi, an allusion to the fact that even a prophet like Moses did not fully comprehend the inner reality of things (haqa'iq al-ashya' kama hiya); and, more generally, to man's lack of equanimity whenever he is faced with something that he has never yet experienced or cannot immediately comprehend. In the last analysis, the above verse implies - as is brought out fully in Moses' subsequent experiences - that appearance and reality do not always coincide; beyond that, it touches in a subtle manner upon the profound truth that man cannot really comprehend or even visualize anything that has no counterpart - at least in its component elements - in his own intellectual experience: and this is the reason for the Qur'anic use of metaphor and allegory with regard to "all that is beyond the reach of a created being's perception" (al-ghayb).

Khidhr does not blame Moses. Each one of us can only follow our own imperfect lights to the best of our judgment, but if we have Faith, we are saved many false steps.