At a first stab: Fârâbî argues that, if something is “first” in the sense that nothing is prior to it, it cannot be dependent on anything for its existence or for its continuation in existence. Therefore it has existed without beginning and will exist without end, and has no potentiality for not existing. It has no efficient cause, but also no material cause: if it had a material cause, its matter would be prior to it, and presumably it would also depend on an efficient cause to turn its matter