Life and Death are like two sides of the same coin, whenever you think about one you also have to think about the other.
As Life is synonymous to birth i.e beginning of something new, i like to think that death also is the beginning of something new. It is just like an interchange point, a point of transformation from one mode of life to another, a life that we are not educated enough to understand at the moment.
i really like this mindset, i think you are right about it being two sides of the same coin. everything that lives dies. that is absolute every spark vanishes, every light dims. it is very ying yang, all good is accompanied by evil, all life is accompanied by death.
death is God's secret there will be no human that know, we as human only ask protection from god.
i am not a fan of this idea, not that i dont respect the thought. rather that i think pinning things on god as an explanation is a lazy one. if god created us for free will why would he want us to not have the knowledge of good and evil, if god wanted our happiness and salvation why make us so we die. it very may be true that it is simply gods secret, but it goes against human nature to not be curious and try to learn. why the sun rose in the east use to be gods secret but we attained the knowledge. so to we will eventually learn the secrets of life and death. its only a matter of time.