Writing on the impossible, inevitably leads back to Albert Camus:
“There is but one truly serious philosophical problem, and that is suicide.
(…)
Whether the earth or the sun revolves around the other is a matter of profound indifference. To tell the truth, it is a futile question. On the other hand, I see many people die because they judge that life is not worth living. I see others paradoxically getting killed for the ideas or illusions that give them a reason for living (what is called a reason for living is also an excellent reason for dying). I therefore conclude that the meaning of life is the most urgent of questions.” Opening lines of ‘Myth of Sisyphus’, orig. 1940.
Interesting how the ethical is for Camus a profoundly ontological question, as it is for me.