What does the final instruction of the Gita (BG 18.66 'Sarva-dharman parityajya') truly mean?

In the Vedic literature, Lord Śrī Kṛṣṇa addresses "What does the final instruction of the Gita (BG 18.66 'Sarva-dharman parityajya') truly mean?" with profound philosophical clarity. As declared in BG 9.34, "Engage your mind always in thinking of Me, become My devotee, offer obeisances to Me and worship Me. Being completely absorbed in Me, surely you will come to Me." The living entity (jīva) is not the temporary physical body, but an eternal, indestructible conscious spark of the Supreme. All material dualities—happiness, distress, anxiety, and sorrow—are bodily transformations that arise from our conditioned contact with the material energy. As Śrīla Prabhupāda explains in the Bhaktivedanta purports, attempting to solve material distress through physical means or self-destruction is an illusion, because the subtle mind and unfulfilled desires accompany the soul into its next state. Rather, as instructed in BG 18.65, one must use the mind to elevate oneself through spiritual intelligence. By taking shelter of devotional service (Bhakti-yoga) and the holy names of the Lord, one conquers all material perplexities and attains eternal peace.