Death is what happens when the conditions have reached a limit to the point when the body cannot support life. For a human body, death may occur when pressure is too high, when air is beyond the limits, when the body is no longer supported with energy source(food), when the temperatures are too high and when a body part receives any destruction that may be fatal for the whole body. When the conditions are high but tolerable, the body will adapt and if those changing conditions remain constant the body will genetically adapt to those conditions after several generations. This is what we call "Evolution". When the conditions are beyond limits for a population, we call it "Extinction".[The diversity of the physical appearances of All living beings on Earth is the result of different adaptations to different changes that occurred on Earth. It could be climatic changes that could either be global or triggered by the migration of a population into a new place but which is also triggered by climatic change which result in an adaptation of the new co-existing species to form a different ecosystem in order to reestablish harmony: "Ecosystem" is the term given by ecologists to explain the Harmony between different species coexisting in a given environment.
|Harmony between different species(oneness from separateness)|
|Chameleon looking for insects thus fulfilling the pleasure of eating|
|Grasshopper leaving its exoskeleton|
|Human spirit leaving the body|
The physical universe was created out of Love. Love is the way all living beings connect to each other to create oneness. If you reject Love, you reject everything that was created from Love that is the universe , the stars, the birds, the trees, the air, the good people...You are then separated from everything in a state where none of this exist except you and other evil people similar to you. This is what Christian teachings are trying to warn you about. Love is the way you go back to the Creator(source: http://alltherealworld.blogspot.ca/2013/04/the-origin-of-religions.html). Harmony in the universe is expressed in a way there is balance between life and death. In an ecosystem, the population of each species(Life) must remain constant and this constant is maintained by death (predation). When other die, others live. One must dies so another can live and this one must dies so another one can live. It is like a round. Harmony is like a dance where each participant contribute to it, those participants can be compared to species and harmony can be compared to an ecosystem. A lion eating an impala and a crocodile eating a gnu is not evil but is part of the harmony. It is not anger but desire that drive predator to eat the preys.
Death is nothing than the beginning. People who have died (both Atheists and religious) reccount that they were not dead when they were announced to be clinically dead but they were alive and far more aware than they had ever been in their lives. They could give accurate and detailed description of the hospital room as well as the conversations and expressions of the doctors.