For Nizaris, there exists a dialectic between revelation and human reasoning, based on a synergy of Islamic scripture and classical Greek philosophy, in particular Aristotelian reasoning and neoplatonic metaphysics. It seeks to extend an understanding of religion and revelation to identify the outwardly apparent ("zahir"), and also to penetrate to the roots, to retrieve and disclose that which is the inner underlying ("batin"). This process of discovery engages both the intellect ('"aql") and the spirit ("ruh"), generating an integral synergy to illuminate and disclose truths ("haqi'qat") culminating in "gnosis" ("ma'rifat"). Parallels have also been noted between the Nizari version of "Imamah" and the Platonic idea of a philosopher king.