Wisdom from the Bhagavad Gita 29

Arjuna said:

1. What is that Brahman, what is Adhyâtma, what is Karma, O best of Purushas? What is called Adhibhuta, and what Adhidaiva?

2. Who, and in what way, is Adhiyajna here in this body, O destroyer of Madhu? And how are You known at the time of death, by the self-controlled?

The Blessed Lord said:

3. The Imperishable is the Supreme Brahman. Its dwelling in each individual body is called Adhyâtma; the offering in sacrifice which causes the genesis and support of beings, is called Karma.

4. The perishable adjunct is the Adhibhuta, and the Indweller is the Adhidaivata; I alone am the Adhiyajna here in this body, O best of the embodied.

5. And he, who at the time of death, meditating on Me alone, goes forth, leaving the body, attains My Being: there is no doubt about this.

6. Remembering whatever object, at the end, he leaves the body, that alone is reached by him, O son of Kunti, because of his constant thought of that object. 

7. Therefore, at all times, constantly remember Me, and fight. With mind and intellect absorbed, in Me, you shall doubtless come to Me.

8. With the mind not moving towards anything else, made steadfast by the method of habitual meditation, and dwelling on the Supreme, Resplendent Purusha, O son of Prithâ, one goes to Him. 

9-10. The Omniscient, the Ancient, the Over-Ruler  minuter than an atom, the Sustainer of all, of form inconceivable, self-luminous like the sun, and beyond the darkness of Mâyâ—he who meditates on Him thus, at the time of death, full of devotion, with the mind unmoving, and also by the power of Yoga, fixing the whole Prâna between the eyebrows, he goes to that Supreme, Resplendent Purusha.

—Bhagavad Gita, 8:1-10