The eleventh century Ismaili thinker, Nasir Khusraw, presents his view of the symbolism of the adhan in his "Face of the Religion" ("Wajh-i Dīn"). In it, he writes in his esoteric interpretation of the adhan that when the muezzin turns to the right saying, ‘come to prayer’ ("ḥayya" is symbolic of saying that one should accept the conveyor of divine revelation ("nāṭiq") and the Imam, thes of the exoteric ("ẓāhir"), by performing the exo prayer. When the muezzin turns to the left saying, ‘come to salvation’ ("ḥayya ʿalā’l-falāḥ"), it means that the knowledge of reality ("ḥaqīqat"), one should accept the foundation of spirit interpretation ("asās") and proof ("ḥujjat") as the lords of the esoteric ("bāṭin"). Nasir Khusraw also adds that the adhan itself is symbolic of the conveyor calling humankind to the Lord of the Resurrection ("Qāʾim al-Qiyāma").