there is nothing sacred about life
life survives because
only the strongest survive (in all animals, plans, virtues, etc)
extreme brutality and suffering is what forces all nature to make progress - and survive
how many lions feel guilty about killing an antelope ?!
when a young nomad lion takes over a pride, it will kill the cubs of a previous lion
why is that? because of sanctity of life?!
no, it's because what i call a hard-wired 'DNA procreation' - only the strongest DNA will survive
if guilt would be the primary factor, we wouldn't have any apex predators
life wouldn't make progress - the weakest would be on equal footing with the strongest
dinosaurs didn't die off because of guilt, or because they felt compassion
they survived 200 million (!!!) years because of their brutality and nothing else: just brute force
the only parameter that changes in our case is
intelligence.
as a side note: i don't know if we would be stronger than dinosaurs because of our intelligence, but we did do a lot more damage to our planet, in less than a million year, because of it (knowledge is power)
but humanity has the ability to suffer on an exponential level because of our intelligence
we created the concept of morality - because we are civilized
we created the concept of religion because we have imagination
we are capable of empathy because we are self-aware
self-awareness brings on a huge baggage to existence:
- we are aware of our existence, distinct from other individuals
- we understand the concept of death, and we understand our own mortality - animals don't
- we extrapolate about our intentions and consequences - and this implies that we understand the concept of 'future'
related to suicide:
- we understand the concept of the
future, in order to intend to die
(this is why all suicides are rational)
- we are aware of our own suffering and its possibility (potentiality)
- most animals suffer, but they don't ponder about it, like we do - there is no deeper level of suffering
- we are ready for self-sacrifice, and we are rational about it (as opposed to natural instinct)
intelligent and self-aware life is one of the main problems in existence - generating huge contradictions
so, after all this knowledge about life - your initial question still remains about the sanctity of life:
- is life sacred ?
personally, i think not :)