Nididhyāsanam — Continuous, Unbroken Meditation
Nididhyāsanam (Sanskrit: ni-dhi-dhyai = to meditate upon deeply/steadily; 'sustained, intensive meditation') is the third and culminating practice of the classical Vedāntic jñāna path: śravaṇam → mananam → nididhyāsanam. It refers to the sustained, unbroken contemplation of Brahman / Bhagavān in which the truths pondered in mananam become so deeply internalised that direct realisation (sākṣātkāra) arises.
The Character of Nididhyāsanam: Unlike mananam (which still involves discursive thinking), nididhyāsanam is a more concentrated, flowing attention — where the mind ceases to wander and remains steadily, naturally, effortlessly fixed on Bhagavān. It is compared to the unbroken flow of oil poured from one vessel to another — a smooth, continuous, frictionless stream.
Nididhyāsanam in Viśiṣṭādvaita: In the Śrī Vaiṣṇava framework, nididhyāsanam takes the form of sustained bhakti yoga — the dhyānam of Bhagavān's form, qualities, and grace that flows from deep prapatti and Āchārya-kṛpā. The Āzhvārs' whole life was nididhyāsanam — an unbroken interior stream of Bhagavān-awareness expressed in the Divya Prabandham.
Fruit: Nididhyāsanam culminates in para bhakti → para jñāna → parama bhakti and ultimately in prāpti — the soul's arrival at Bhagavān.