Fir

“The unknown," said Faxe's soft voice in the forest, "the unforetold, the unproven, that is what life is based on. Ignorance is the ground of thought. Unproof is the ground of action. If it were proven that there is no God there would be no religion. No Handdara, no Yomesh, no hearthgods, nothing. But also if it were proven that there is a God, there would be no religion. ... Tell me, Genry, what is known? What is sure, unpredictable, inevitable -- the one certain thing you know concerning your future, and mine?"

That we shall die."

Yes, There's really only one question that can be answered, Genry, and we already know the answer. ... The only thing that makes life possible is permanent, intolerable uncertainty: not knowing what comes next.”
― Ursula K. Le Guin, The Left Hand of Darkness

“When a person dies, they cross over from the realm of freedom to the realm of slavery. Life is freedom, and dying is a gradual denial of freedom. Consciousness first weakens and then disappears. The life-processes – respiration, the metabolism, the circulation – continue for some time, but an irrevocable move has been made towards slavery; consciousness, the flame of freedom, has died out.
The stars have disappeared from the night sky; the Milky Way has vanished; the sun has gone out; Venus, Mars and Jupiter have been extinguished; millions of leaves have died; the wind and the oceans have faded away; flowers have lost their colour and fragrance; bread has vanished; water has vanished; even the air itself, the sometimes cool, sometimes sultry air, has vanished. The universe inside a person has ceased to exist. This universe is astonishingly similar to the universe that exists outside people. It is astonishingly similar to the universes still reflected within the skulls of millions of living people. But still more astonishing is the fact that this universe had something in it that distinguished the sound of its ocean, the smell of its flowers, the rustle of its leaves, the hues of its granite and the sadness of its autumn fields both from those of every other universe that exists and ever has existed within people, and from those of the universe that exists eternally outside people. What constitutes the freedom, the soul of an individual life, is its uniqueness. The reflection of the universe in someone's consciousness is the foundation of his or her power, but life only becomes happiness, is only endowed with freedom and meaning when someone exists as a whole world that has never been repeated in all eternity. Only then can they experience the joy of freedom and kindness, finding in others what they have already found in themselves.”
― Vasily Grossman, Life and Fate