If we want eternal life of bliss and knowledge, then we must endeavour in this life how to go back to home, back to Godhead. The life of a human being is a chance to prepare oneself to go back to Godhead, or to get rid of the material existence, the repetition of birth and death.
Parikshit Maharaja was fortunate to get a seven-day notice to meet his inevitable death. But for the common man there is no definite notice, although death is inevitable for all.
Foolish men forget this sure fact of death and neglect the duty of preparing themselves for going back to Godhead. They spoil their lives in animal propensities to eat, drink, be merry and enjoy.
If we follow the principles of Bhagavad-gita As It Is, we will find answers for all the problems of life, and if we take it seriously, then the whole human society will be happy, peaceful, in this life, and next life they will go back to home, back to Godhead for eternal blissful life of knowledge.
(From the teachings of Srila Prabhupada)