         It appears that Khayyam equates existence and essence as having emanated from God in an orderly fashion, but there is no explanation of how essence becomes primary and existence secondary. In fact, if existence did not exist how could essences come to be? They would have to come to be without Being-be there to receive them, as it were. Either essence or existence emanated from God separately, in which case their priority and posterity are not essential as is the relationship between father and son, or their priority is accidental. The latter is not the type of priority that Khayyam has in mind; if essence is to be essentially prior to existence, they both could not have been emanated from God and one should be a byproduct of the other, i.e., an ontological level of reality.     