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.
He who departs by leaving the body while uttering the single syllable, viz Om, which is Brahman, and thinking of Me, he attains the supreme Goal.OPEN VERSE
O son of Prtha, to that yogi of constant concentration and single-minded attention, who remembers Me uninterruptedly and for long, I am easy of attainment.OPEN VERSE
As a result of reaching Me, the exalted ones who have attained the highest perfection do not get rebirth which is an abode of sorrows and which is impermanent.OPEN VERSE
O Arjuna, all the worlds together with the world of Brahma are subject to return. But, O son of Kunti, there is no rebirth after reaching Me.OPEN VERSE
Those people who are knowers of what day and night are, know the day of Brahma which ends in a thousand yugas [The four yugas (in the human worlds), viz Satya, Treta, Dwapara, and Kali are made up of 4,320,000 years. This period multiplied by a thousand constitutes one day of Brahma. His night also extends over an equal period.], and His night which ends in a thousand yugas.OPEN VERSE