Man's life is so revolved around his activities that he lives in a belief that he is immortal forever till the reality arises.  He is also under the belief that he is far away from the influence of natural laws on him but he isn't so.  He also forgets that he is a biological organism just like any other organism except that his intellectual abilities far surpasses the other organisms.  My introspection on death was answered by many quotes and I liked a particular quote which compares sleep and death.  This comparison is one of the best description of death by mortal soul.  SLEEP is temporary death and DEATH is permanent sleep.  I would like to modify the quote and put it into more rational description away from Metaphysics as - SLEEP is temporary loss of consciousness whereas DEATH is permanent loss of consciousness.  Different beliefs gives perspective to different opinions about death and after death.  As a Biologist I can only describe death through the purview of other organisms.  A loss where the living matter is converted into non-living matter and that biotic energy is converted into abiotic energy.  I also can describe that at the onset of death we enter into the abiotic cycle in the simplest forms as Carbon di oxide, Oxygen and other gases whether we like or dislike.  We fail to recognise that even we are ruled by the food chain of the ecosystem.  That even we have to ultimately end up in the hands of the detrivores or decomposers.  This is the harsh reality which we don't want to give recognition to.  Rather we try to portray an image of divinity, rebirth and karma that appeases our fantasy.  The word DEATH is conceived by us to be such a negative word that we very rarely think about it or try to understand its meaning and implication.  I always believe that man can appreciate his life better if he understands the meaning of death.  Many a times I am aghast at man sacrificing his life in the hope of reaching eternity and netherworld which no one has travelled forth and returned.  This utopian definition of death makes them to be victim of different propaganda and ideologies that they are willing to sacrifice not only their life but also others to spread the ideology at the cost of their genotype vanishing forever from the genepool of the human population.  Only if all these people had realised the real meaning of death such a loss would never occur. The poetry substantiating DEATH to be a GREAT LEVELLER which doesn't discriminate between race, sex, community, caste, class and hierarchy level is one of the great paradox of life because throughout our lifetime we are  striving to prove that we are superior but fail to realise that - "After the game of chess all the pawns go into the same box".  I don't mean to say that we should fear death when we are living but rather realise the futility of some of the goals that we are after and sometimes take the extreme step of commiting suicide when we fail to realise those goals.  Life is to live, make it meaningful - with more of pleasure and less of pain, with more of success and less of failure, with more of love and less of hate.....We forget to realise these goals and are instead abusing ourselves in having the vice versa of the above said.    Life is too beautiful to be gambled.  The most precious asset of  man or any organism is his life.  Let us ...understand death to realise life.