Terry Pratchett. The Grim Reaper (№ 95985)

Really that's what it's like to be alive? Is it to be alive is to feel that you are attracted in hopeless darkness? How can people live with this? But live - and even find some joy in your existence, although it is acceptable only despair. Amazing. Feel insignificant living being sandwiched between two very tall cliffs of dark... It's unbearable. How? As they endure this life?
Obviously, it's innate.