Within the Ayyavazhi tradition, two texts stand out as the central pillars of its scriptural heritage: the Akilattirattu Ammanai, often referred to simply as Akilam, and the Arul Nool. Akilattirattu Ammanai is regarded as the primary and most authoritative scripture, forming the doctrinal and narrative foundation of the faith. It presents a sweeping vision that includes cosmology and theology, the unfolding of ages, and the life, mission, and teachings of Ayya Vaikundar. Through this text, the tradition articulates its understanding of divine activity in history and the spiritual destiny of beings.

The Arul Nool functions as a complementary body of scripture, standing alongside Akilam while serving a different role. It gathers together teachings and sayings associated with Ayya Vaikundar, as well as prayers, hymns, and ritual instructions that shape daily devotional life and communal worship. These writings offer practical guidance for religious observance and provide further elaboration on themes that appear in the primary text. Together, Akilattirattu Ammanai and Arul Nool form a coherent scriptural corpus, in which one text lays the theological groundwork and the other gives it liturgical and devotional expression.