Arul Nool, revered as a secondary scripture within the Ayyavazhi tradition, gathers revelations, hymns, and instructions that revolve around the figure of Ayya Vaikundar and the ultimate reality, Ekam. It presents Vaikundar as the supreme incarnation of Narayana (Vishnu), whose mission is to bring an end to the Kali Yukam, the age of darkness, and to inaugurate Dharma Yukam, an era of righteousness and justice. Within this theological frame, the text articulates a vision in which all existence emerges from a single oneness, and history itself is drawn into a divine plan. The eschatological teachings describe the decline of the present age through moral corruption and foretell a future egalitarian divine kingdom under Vaikundar’s reign. Followers are encouraged to live already in a manner befitting that coming order, thus aligning personal life with a cosmic transformation.

Ethical and social teachings occupy a central place in Arul Nool. The text condemns caste discrimination, social oppression, and exploitation, insisting on the equality of all human beings regardless of birth or status. It stresses virtues such as truthfulness, compassion, humility, non‑violence, and charity, and criticizes corruption, religious hypocrisy, and rigid hierarchies. These moral directives are not merely individual ideals but are framed as the groundwork for social reform and the liberation of the oppressed. The emphasis on equality extends to the broader vision of community life, where mutual help, unity, and responsibility toward the downtrodden are treated as spiritual imperatives.

At the level of practice, Arul Nool provides guidance for devotion, worship, and spiritual discipline. It contains hymns and songs praising Vaikundar as the supreme divine principle and prescribes their recitation in daily life and communal worship. Directions are given for simple, sincere forms of bhakti, including collective singing, fasting, and organized worship at Pathis and Nizhal Thangals, rather than elaborate ritualism. Spiritual discipline is described in terms of inner transformation: overcoming ego, anger, lust, and greed, cultivating detachment from material pursuits, and living a disciplined life within family and society. Through such practices, devotees are invited to participate consciously in the transition from Kali Yukam to Dharma Yukam, allowing inner purity and outer justice to reflect one another.