This material world is called the world of death. Every living being, beginning from Brahmā, whose duration of life is some thousands of millions of years, down to the germs who live for a few seconds only, is struggling for existence. Therefore, this life is a sort of fight with material nature, which imposes death upon all. In the human form of life, a living being is competent enough to come to an understanding of this great struggle for existence, but being too attached to family members, society, country, etc., they want to win over the invincible material nature by the aid of bodily strength, children, wife, relatives, etc. Although sufficiently experienced in the matter by dint of past experience and previous examples of his deceased predecessors, one does not see that the so-called fighting soldiers like the children, relatives, society members and countrymen are all fallible in the great struggle.
One should examine the fact that his father or his father’s father has already died, and that he himself is therefore also sure to die, and similarly, his children, who are the would be fathers of their children, will also die in due course. No one will survive in this struggle with material nature. The history of human society definitely proves it, yet people still suggest that in the future they will be able to live perpetually, with the help of material science. The great ocean of material nature is tossing with the waves of time, and the so-called living conditions are something like foaming bubbles, which appear before us as bodily self, wife, children, society, countrymen, etc. Due to a lack of knowledge of self, we become victimized by the force of ignorance and thus spoil the valuable energy of human life in a vain search after permanent living conditions, which are impossible in this material world.
Ref >> Srila Prabhupada Vani.