What is "kill oneself"

Usage examples of "kill oneself".

It is not so much an active thing, this feeling, not so much a desire to kill oneself as it is a desire not to be.

Putting by the Second Rule for Prisoners, Melanippe then informed me, more calmly but still in a cool fury, of the First -- to die in battle rather than be taken prisoner, since Amazons must expect to be raped by their Sexist Pig Captors -- and the Third -- if captured by surprise, to kill oneself as soon as possible, not to afford more gratification than necessary to those same SPC's.

This has always seemed to me (not that it's any of my business, mind you) a particularly thoughtless and selfish way to kill oneself.

Whether or not there was a reason to kill oneself, some people killed themselves.

For why kill oneself, when nature is so very eager to do it for you, and to gobble you up?