ओमित्येकाक्षरं ब्रह्म व्याहरन्मामनुस्मरन् ।यः प्रयाति त्यजन्देहं स याति परमां गतिम् ॥
omityekākṣaraṃ brahma vyāharanmāmanusmaranyaḥ prayāti tyajandehaṃ sa yāti paramāṃ gatim
All the doors of the senses closed, the mind shut in into the heart, the life-force taken up out of its diffused movement into the head, the intelligence concentrated in the utterance of the sacred syllable OM and its conceptive thought in the remembrance of the supreme Godhead, he who goes forth, abandoning the body, he attains to the highest status.
Gītā 8·13That is the established Yogic way of going, a last offering up of the whole being to the Eternal, the Transcendent. But still that is only a process; the essential condition is the constant undeviating memory of the Divine in life, even in action and battle— mām anusmaran yuddha ca —and the turning of the whole act of living into an uninterrupted Yoga, nitya-yoga.