Bahá’u’lláh, born Mírzá Ḥusayn-‘Alí Núrí in Persia and living from 1817 to 1892, is regarded by Bahá’ís as the founder of their faith and the central figure around whom its entire spiritual vision revolves. He is seen as the most recent “Manifestation of God” in a line of divine messengers that includes Abraham, Moses, Buddha, Jesus, Muḥammad, and the Báb, and as the promised figure foretold by the Báb himself. In this understanding, his appearance represents a new stage in the unfolding of religion, not as a break with the past, but as its organic continuation. For Bahá’ís, his life of exile and imprisonment, stretching across several decades, is not merely a historical detail but a sign of the depth and sincerity of his mission.

His centrality also rests on the vast body of writings he revealed, which Bahá’ís regard as divinely inspired scripture. Among these are the Kitáb-i-Aqdas (the “Most Holy Book”) and the Kitáb-i-Íqán (the “Book of Certitude”), which together with many other texts form the doctrinal and legal foundation of the Bahá’í community. In these writings, he sets out spiritual teachings, religious laws, and social principles that Bahá’ís strive to embody in both personal conduct and collective life. Because these texts are seen as authoritative, they serve as the primary reference point for belief, practice, and community organization.

At the heart of Bahá’u’lláh’s message is a profound theology of unity: the oneness of God, the oneness of religion, and the oneness of humanity. His teachings call for the elimination of prejudice, the equality of women and men, the harmony of science and religion, universal education, and practical steps toward global peace and justice. In this light, he is understood as the promised figure anticipated in earlier religions, whose role is to guide humanity toward a more mature stage of collective life characterized by justice, peace, and an ever-deepening sense of human solidarity. His life and writings thus function together as both pattern and charter for a community that seeks to translate spiritual ideals of unity into concrete social reality.

Bahá’u’lláh also established the basic framework for the Bahá’í community’s continuity and cohesion. Through his explicit designation of ‘Abdu’l‑Bahá as the authorized interpreter of his teachings, he laid what Bahá’ís call a “Covenant,” intended to safeguard unity and prevent schism. The administrative order and institutions of the Bahá’í Faith ultimately trace their authority to his writings and this covenantal arrangement. For Bahá’ís, therefore, Bahá’u’lláh is not only a messenger of divine truth but the architect of a religious community designed to reflect, as faithfully as possible, the principles of unity that he proclaimed.