However, Avicenna who was more philosopher than theologian, followed the same line of argumentation as that of his ancient master, Aristotle, and tried to reconcile between "ast" and "hast", by considering the latter as higher order of existence than the former. It is like a hierarchical order of existence. It was a philosophical Tower of Babel that the restriction of his own mother tongue (Persian) would not allow to be built, but he could maneuver in Arabic by giving the two concepts the same name "wujud", although with different attributes. So, implicitly, "astī" (is-ness) appears as ممکن الوجود "momken-al-wujud" (contingent being), and "hastī" (existence) as واجب الوجود "wājeb-al-wujud" (necessary being).