Since the process of vānaprastha is recommended for those nearing the end of life, there is always the likelihood that one will prematurely succumb to the symptoms of old age and be unable to reach the final stage of sannyāsa. If one simply cannot carry on his religious duties due to old age, it is here advised that he fix the mind in Lord Kṛṣṇa and enter into the sacrificial fire. Although this may not be possible in the modern age, we can appreciate the absolute seriousness of going back home, back to Godhead, as evidenced in this verse.