Ramakrishna’s teaching stands firmly on the Advaitic insight that there is one ultimate Reality, Brahman, which is the sole ground of existence and identical with the inmost Self. He affirmed that in the highest realization, especially in nirvikalpa samādhi, all subject–object distinctions fall away and only nondual consciousness remains. In this sense, his experiences and descriptions align closely with classical Advaita Vedanta’s portrayal of the Absolute as beyond all attributes and conceptualization. He repeatedly upheld the truth that individual consciousness and universal consciousness are fundamentally one, and that spiritual life culminates in the direct realization of this unity rather than in mere intellectual understanding.

At the same time, his way of embodying nondualism is strikingly inclusive and synthetic. While acknowledging the formless, attributeless Brahman of Advaita, he also affirmed with equal seriousness the reality and value of Brahman “with attributes,” approached through devotion to personal forms of the Divine such as the Divine Mother. Rather than treating the world of names and forms as something to be dismissed, he saw them as authentic expressions of the same nondual Reality, suited to different temperaments and stages of growth. In his vision, jñāna and bhakti are not rival paths but complementary movements that can both lead to the same realization of oneness.

A distinctive feature of his Advaitic outlook is the extension of nondual insight to the plurality of religions. He taught that all genuine spiritual paths, whether Hindu, Muslim, Christian, or otherwise, ultimately converge in the realization of the one Brahman. The apparent doctrinal and ritual differences between traditions were, for him, variations in approach to the same Truth rather than competing ultimates. This harmony of religions is not a mere theory but an application of nondualism to the religious field itself: the One is encountered through many symbols, practices, and conceptions, yet remains undivided.

Ramakrishna thus presents a form of Advaita that is both rigorous in its affirmation of nondual Brahman and generous in its embrace of devotional practice and religious diversity. The devotee–God relationship, with all its emotional richness, is honored as a valid and even necessary phase for many seekers, which can ripen into the direct realization of unity. His life and teaching suggest that the Absolute and its manifold expressions are not mutually exclusive but mutually illuminating: the formless is known through form, and form is finally recognized as nothing other than the formless. In this way, his spirituality exemplifies a lived nondualism that does not negate the relative but sees it transparently as the play of the one Consciousness.