The eighth chapter of the Bhagavad Gita is Akshara Brahma Yoga. In this chapter, Krishna reveals the importance of the last thought before death. If we can remember Krishna at the time of death, we will certainly attain him. Thus, it is very important to be in constant awareness of the Lord at all times, thinking of Him and chanting His names at all times. By perfectly absorbing their mind in Him through constant devotion, one can go beyond this material existence to Lord's Supreme abode.
Arjuna said: O supreme person, what is that Brahman? What is that which exists in the individual plane? What is action? And what is that which is said to exist in the physical plane? What is that which is said to be existing in the divine plane?OPEN VERSE
O Madhusudana, how, and who, is the entity existing in the sacrifice here in this body? And at the time of death, how are You to be known by people of concentrated minds?OPEN VERSE
The Blessed Lord said: The Immutable is the supreme Brahman; self-hood is said to be the entity present in the individual plane. By action is meant the offerings which bring about the origin of the existence of things.OPEN VERSE
That which exists in the physical plane is the mutable entity, and what exists in the divine plane is the Person. O best among the embodied beings, I Myself am the entity that exists in the sacrifice in this body.OPEN VERSE
And at the time of death, anyone who departs by giving up the body while thinking of Me alone, he attains My state. There is no doubt about this.OPEN VERSE