Sankaracarya's Vivekachudamani 411

प्रकृतिविकृतिशून्यं भावनातीतभावं

समरसमसमानं मानसं बन्धदूरम् ।

निगमवचनसिद्धं नित्यमस्मत्प्रसिद्धं

हृदि कलयति विद्वान् ब्रह्म पूर्णं समाधौ ॥

prakṛtivikṛtiśūnyaṃ bhāvanātītabhāvaṃ

samarasamasamānaṃ mānasaṃ bandhadūram |

nigamavacanasiddhaṃ nityamasmatprasiddhaṃ

hṛdi kalayati vidvān brahma pūrṇaṃ samādhau ||

(Sankaracarya's Vivekachudamani 411)

Through Samadhi, the wise realize the infinite Brahman in the heart, as devoid of cause and effect, as the Reality beyond all imagination, as homogenous, beyond all compares and proofs, established by the declarations of the scriptures as eternally self-established.

Samadhi is meditation or trance in today's terminology. The stage of perfection is called trance, or samadhi when one's mind is completely restrained from material mental activities by the practice of yoga. This is characterized by one's ability to see the self by the pure mind and to relish and rejoice in the self. In that joyous state, one is situated in boundless transcendental happiness and enjoys himself through transcendental senses. Established thus, one never departs from the truth, and upon gaining this he thinks there is no greater gain. Being situated in such a position, one is never shaken, even in the midst of greatest difficulty. This indeed is actual freedom from all miseries arising from material contact.