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.
Smoke, night, as also the dark fortnight and the six months of the Southern solstice-following this Path the yogi having reached the lunar light, returns.OPEN VERSE
These two courses of the world, which are white and black, are verily considered eternal. By the one a man goes to the State of Non-return; by the other he returns again.OPEN VERSE
O son of Prtha, no yogi [One steadfast in meditation.) whosoever has known these two courses becomes deluded. Therefore, O Arjuna, be you steadfast in yoga at all times.OPEN VERSE
Having known this, the yogi transcends all those results of righteous deeds that are declared with regard to the Vedas, sacrifices, austerities and also charities, and he reaches the primordial supreme State.OPEN VERSE