   Echoing a Neoplatonic hierarchy of being, Farabi ranks the intelligible order of our sub-lunar world, the Agent Intellect being at the top and prime matter at the bottom. Intellection of the separate, immaterial substances of the heavens, particularly intellection of the Agent Intellect, is the highest cognition desirable, except that Farabi does not think it possible. Not even acquiring total or near-total knowledge of everything in our world will suffice for Farabi; the formation of our intelligibles differs from their order in the Agent Intellect, and there is a qualitative difference between their presence in it and as known to us; we must make do with imitations or likenesses (ashbâh) of the pure intelligibles (Bouyges, 29; Hyman, 219).