From survival of the fittest to survival in eternal life

The material world is characterized by a struggle for existence, and survival of the fittest is a well-known principle, but the poor souls of this material world do not know what is survival and who is fit. Survival does not mean that one should die; survival means that one should not die, but should enjoy an everlastingly blissful life of knowledge. This is survival. The Krishna consciousness movement is meant to make every person fit for survival. Indeed, it is meant to stop the struggle for existence. The Srimad-Bhagavatam and Bhagavad-gita give definite directions on how to stop the struggle for existence and how to survive in eternal life. The sankirtana movement, therefore, is a great opportunity. Simply by hearing Bhagavad-gita and chanting the Hare Krishna maha-mantra, one becomes completely purified. Thus the struggle for existence ceases, and one goes back home, back to Godhead.

Srimad Bhagavatam 8.5.23 purport