kāmādibhir anāviddhaṁ
praśāntākhila-vṛtti yat
cittaṁ brahma-sukha-spṛṣṭaṁ
naivottiṣṭheta karhicit
kāma-ādibhiḥ - by various lusty desires; anāviddham - unaffected; praśānta - calm and peaceful; akhila-vṛtti - in every respect, or in all activities; yat - that which; cittam - consciousness; brahma-sukha-spṛṣṭam - being situated on the transcendental platform in eternal bliss; na - not; eva - indeed; uttiṣṭheta - can come out; karhicit - at any time.
Brahma-sukha-spṛṣṭam is also described in Bhagavad-gītā (18.54):
brahma-bhūtaḥ prasannātmā
na śocati na kāṅkṣati
samaḥ sarveṣu bhūteṣu
mad-bhaktiṁ labhate parām
“One who is transcendentally situated at once realizes the Supreme Brahman and becomes fully joyful. He never laments or desires to have anything; he is equally disposed toward every living entity. In this situation, he begins transcendental activities, or devotional service to the Lord.” Generally, once elevated to the transcendental platform of brahma-sukha, transcendental bliss, one never comes down. But if one does not engage in devotional service, there is a chance of his returning to the material platform. Āruhya kṛcchreṇa paraṁ padaṁ tataḥ patanty adho ’nādṛta-yuṣmad-aṅghrayaḥ: one may rise to the platform of brahma-sukha, transcendental bliss, but even from that platform one may fall down to the material platform if he does not engage himself in devotional service.