We are machines. Complex biological machines. The average number of heart beats for mammals is 1.5 billion per lifetime. No matter what size or shape of the mammal. Big mammals have lower heart rates. Small mammals have higher. This explains the difference in lifespans between species. There is also a cellular metabolic factor which is proportional to size.
The human heart beats a higher amount of beats than the average, due to the human ability to consciously intervene in our mechanical operation by modifying diet, exercise and intervening in disease with biochemicals and surgery.
Once we accept that we are indeed mortal, mechanical entities, we can exert ourselves even more diligently in extending our lifespan by taking active interest and precautions. We are not simply pawns of some deity or victims of some cruel Fate. Each of us is a machine with various strengths and weaknesses to be developed or compensated for. Our equality lies in this very common denominator.
Practice is the process of machine maintenance and improvement.
